Scala
repo: lauris/awesome-scala
category: Programming Languages
related: Apache Spark · Haskell · Elixir · Erlang
Awesome Scala 
A community driven list of useful Scala libraries, frameworks and software. This is not a catalog of all the libraries, just a starting point for your explorations. Inspired by awesome-python. Other amazingly awesome lists can be found in the awesome-awesomeness list.
Also awesome is Scaladex, the searchable, tagged, and centralized index of Scala libraries.
Projects with over 500 stargazers are in bold.
Contributing
Your contributions are always welcome! Please submit a pull request or create an issue to add a new framework, library or software to the list. Do not submit a project that hasn’t been updated in the past 6 months or is not awesome.
Don't modify README.md in your pull request. It is automatically generated. Modify template.md instead.
Table of Contents
- Learning Scala
- Projects
- Android
- Archive and Compression
- Artificial Intelligence
- Authentication
- Authorization
- Big Data
- Command Line Interfaces
- Cryptography
- CSV
- Data Binding and Validation
- Database
- DevOps
- Distributed Systems
- Extensions
- Functional Reactive Programming
- Geospatial
- Graphical User Interfaces
- HTTP
- i18n
- Image processing and image analysis
- JavaScript
- JSON
- Markdown
- Metrics and Monitoring
- Misc
- Modularization and Dependency Injection
- Parsing
- Reactive Web Frameworks
- Sbt plugins
- Science and Data Analysis
- Scheduling
- Semantic Web
- Serialization
- Templating
- Testing
- Tools
- Web Frameworks
- XML / HTML
- YAML
- Learning Scala
- Contributing
Archive and Compression
| Name | Description | GitHub Activity |
|---|
Artificial Intelligence
| Name | Description | GitHub Activity |
|---|
Database
Database access libraries in Scala.
| Name | Description | GitHub Activity |
|---|---|---|
| akka-persistence-gcp-datastore | akka-persistence-gcp-datastore is a journal and snapshot store plugin for akka-persistence using google cloud firestore in datastore mode. | |
| anorm | The Anorm database library | |
| clickhouse-scala-client | Clickhouse Scala Client with Reactive Streams support | |
| couchbase-jvm-clients | The Couchbase Monorepo for JVM Clients: Java, Scala, io-core… | |
| doobie | Functional JDBC layer for Scala. | |
| elastic4s | 🔍 Elasticsearch Scala Client - Reactive, Non Blocking, Type Safe, HTTP Client | |
| etcd4s | Scala etcd client implementing V3 APIs | |
| laserdisc | A Future-free Fs2 native pure FP Redis client | |
| mysql-binlog-stream | None | |
| neotypes | Scala lightweight, type-safe, asynchronous driver for neo4j | |
| pulsar4s | Idiomatic, typesafe, and reactive Scala client for Apache Pulsar | |
| zio-quill | Compile-time Language Integrated Queries for Scala | |
| ReactiveMongo | :leaves: Non-blocking, Reactive MongoDB Driver for Scala | |
| rediscala | Non-blocking, Reactive Redis driver for Scala (with Sentinel support) | |
| relate | Performant database access in Scala | |
| sangria | Scala GraphQL implementation | |
| scala-forklift | Type-safe data migration tool for Slick, Git and beyond. | |
| scalarelational | Type-Safe framework for defining, modifying, and querying SQL databases | |
| scalikejdbc | A tidy SQL-based DB access library for Scala developers. This library naturally wraps JDBC APIs and provides you easy-to-use APIs. | |
| scanamo | Simpler DynamoDB access for Scala | |
| slick | Slick (Scala Language Integrated Connection Kit) is a modern database query and access library for Scala | |
| slick-pg | Slick extensions for PostgreSQL | |
| squery | Simple SQL queries in Scala 3 | |
| squeryl | A Scala DSL for talking with databases with minimum verbosity and maximum type safety | |
| molecule | Molecule translates custom Scala code to database queries for multiple databases. | |
| zio-redis | A ZIO-based redis client | |
| skunk | A data access library for Scala + Postgres. | |
| kvs | Highly available distributed strong eventual consistent and sequentially consistent storage with feeds, sorting and search |
Messaging
| Name | Description | GitHub Activity |
|---|
Graphical User Interfaces
Libraries for creation of graphical user interfaces
| Name | Description | GitHub Activity |
|---|---|---|
| scalafx | ScalaFX simplifies creation of JavaFX-based user interfaces in Scala |
Web Frameworks
Scala frameworks for web development.
| Name | Description | GitHub Activity |
|---|---|---|
| analogweb-scala | Tiny High Performance HTTP Server for Scala | |
| cask | Cask: a Scala HTTP micro-framework. Cask makes it easy to set up a website, backend server, or REST API using Scala | |
| finatra | Fast, testable, Scala services built on TwitterServer and Finagle | |
| framework | Lift Framework | |
| playframework | The Community Maintained High Velocity Web Framework For Java and Scala. | |
| scalajs-react | Facebook's React on Scala.JS | |
| scalatra | Tiny Scala high-performance, async web framework, inspired by Sinatra | |
| sharaf | Minimalistic Scala 3 web framework | |
| unfiltered | A toolkit for servicing HTTP requests in Scala | |
| youi | Next generation user interface and application development in Scala and Scala.js for web, mobile, and desktop. |
Reactive Web Frameworks
Scala libraries for Reactive Web development
| Name | Description | GitHub Activity |
|---|---|---|
| Binding.scala | Reactive data-binding for Scala | |
| udash-core | Scala framework for building beautiful and maintainable web applications. | |
| vertx-lang-scala | Vert.x for Scala |
Data Binding and Validation
Scala libraries for data binding and validation
| Name | Description | GitHub Activity |
|---|---|---|
| dupin | Minimal, idiomatic, customizable validation Scala library. | |
| octopus | Scala library for boilerplate-free validation |
i18n
Scala libraries for i18n.
| Name | Description | GitHub Activity |
|---|---|---|
| scaposer | GNU Gettext .po file loader for Scala |
Authentication
Libraries for implementing authentications schemes.
| Name | Description | GitHub Activity |
|---|---|---|
| play-googleauth | Simple play module for authenticating against Google | |
| play-pac4j | Security library for Play framework 2 in Java and Scala: OAuth, CAS, SAML, OpenID Connect, LDAP, JWT... | |
| scala-oauth2-provider | OAuth 2.0 server-side implementation written in Scala |
Cryptography
Cryptography and Encryption Libraries.
| Name | Description | GitHub Activity |
|---|---|---|
| scrypto | Cryptographic primitives for Scala | |
| jose | Extensible JOSE library for Scala |
Testing
Libraries for code testing.
| Name | Description | GitHub Activity |
|---|---|---|
| bencher | 🐰 Bencher - Continuous Benchmarking | |
| cornichon | Testing tool in Scala for HTTP JSON API | |
| gatling | Modern Load Testing as Code | |
| minitest | The super light testing library for Scala and Scala.js | |
| mockito-scala | Mockito for Scala language | |
| munit | Scala testing library with actionable errors and extensible APIs | |
| scalacheck | Property-based testing for Scala | |
| ScalaMock | Native Scala mocking framework | |
| scalaprops | property based testing library for Scala | |
| scalatest | A testing tool for Scala and Java developers | |
| specs2 | Software Specifications for Scala | |
| stryker4s | Mutation testing for Scala | |
| weaver-test | A test framework that runs everything in parallel. | |
| testcontainers-scala | Docker containers for testing in scala | |
| utest | A simple testing framework for Scala |
JSON
Libraries for work with json.
| Name | Description | GitHub Activity |
|---|---|---|
| argonaut | Purely functional JSON parser and library in scala. | |
| borer | Efficient CBOR and JSON (de)serialization in Scala | |
| circe | Yet another JSON library for Scala | |
| diffson | A scala diff/patch library for Json | |
| jackson-module-scala | Add-on module for Jackson (https://github.com/FasterXML/jackson) to support Scala-specific datatypes | |
| jawn | Jawn is for parsing jay-sawn (JSON) | |
| json4s | JSON library | |
| jsoniter-scala | Scala macros for compile-time generation of safe and ultra-fast JSON codecs + circe booster | |
| ninny-json | JSON typeclasses that know the difference between null and absent fields | |
| play-json | The Play JSON library | |
| ScalaJack | Fast JSON parser/generator for Scala | |
| spray-json | A lightweight, clean and simple JSON implementation in Scala | |
| tupson | Stupid simple Scala 3 library for writing and reading JSON | |
| zio-json | Fast, secure JSON library with tight ZIO integration. |
YAML
Libraries for work with YAML.
| Name | Description | GitHub Activity |
|---|
CSV
Libraries for work with CSV.
| Name | Description | GitHub Activity |
|---|---|---|
| kantan.csv | CSV handling library for Scala | |
| scala-csv | CSV Reader/Writer for Scala | |
| spata | Functional, stream-based CSV processor for Scala |
Serialization
Libraries for serializing and deserializing data for storage or transport.
| Name | Description | GitHub Activity |
|---|---|---|
| borer | Efficient CBOR and JSON (de)serialization in Scala | |
| avro4s | Avro schema generation and serialization / deserialization for Scala | |
| chill | Scala extensions for the Kryo serialization library | |
| ScalaPB | Protocol buffer compiler for Scala. | |
| scodec | Scala combinator library for working with binary data | |
| scrooge | A Thrift parser/generator | |
| upickle | uPickle: a simple, fast, dependency-free JSON & Binary (MessagePack) serialization library for Scala | |
| proto | Lightweight and fast serialization library for Scala 2/3 based on Protocol Buffers with macros |
Science and Data Analysis
Libraries for scientific computing, data analysis and numerical processing.
| Name | Description | GitHub Activity |
|---|---|---|
| algebird | Abstract Algebra for Scala | |
| ipex-llm | Accelerate local LLM inference and finetuning (LLaMA, Mistral, ChatGLM, Qwen, Baichuan, Mixtral, Gemma, Phi, MiniCPM, etc.) on Intel XPU (e.g., local PC with iGPU and NPU, discrete GPU such as Arc, Flex and Max); seamlessly integrate with llama.cpp, Ollama, HuggingFace, LangChain, LlamaIndex, GraphRAG, DeepSpeed, vLLM, FastChat, Axolotl, etc. | |
| breeze | Breeze is/was a numerical processing library for Scala. | |
| doddle-model | :cake: doddle-model: machine learning in Scala. | |
| libra | A dimensional analysis library based on dependent types | |
| LoMRF | LoMRF is an open-source implementation of Markov Logic Networks | |
| mgo | Purely functional genetic algorithms for multi-objective optimisation | |
| MLLib | Machine Learning framework for Spark | |
| numsca | numsca is numpy for scala | |
| onnx-scala | An ONNX (Open Neural Network eXchange) API and backend for typeful, functional deep learning and classical machine learning in Scala 3 | |
| openmole | Workflow engine for exploration of simulation models using high throughput computing | |
| Optimus | Optimus is a mathematical programming library for Scala. | |
| OscaR | a Scala toolkit for solving Operations Research problems | |
| rings | Rings: efficient JVM library for polynomial rings | |
| smile | Statistical Machine Intelligence & Learning Engine | |
| spire | Powerful new number types and numeric abstractions for Scala. | |
| squants | The Scala API for Quantities, Units of Measure and Dimensional Analysis | |
| zeppelin | Web-based notebook that enables data-driven, interactive data analytics and collaborative documents with SQL, Scala and more. | |
| spark-nlp | State of the Art Natural Language Processing | |
| VecMatLib | Open source Scala library that provides data structures for vectors and matrices |
Big Data
| Name | Description | GitHub Activity |
|---|---|---|
| flink | Apache Flink | |
| gridscale | Scala library for accessing various file, batch systems, job schedulers and grid middlewares. | |
| kafka | Mirror of Apache Kafka | |
| alpakka-kafka | Alpakka Kafka connector - Alpakka is a Reactive Enterprise Integration library for Java and Scala, based on Reactive Streams and Akka. | |
| scio | A Scala API for Apache Beam and Google Cloud Dataflow. | |
| Scrunch | A Scala wrapper for Apache Crunch which provides a framework for writing, testing, and running MapReduce pipelines. | |
| spark | Apache Spark - A unified analytics engine for large-scale data processing | |
| gallia-core | A schema-aware Scala library for data transformation | |
| nussknacker | Low-code tool for automating actions on real time data | Stream processing for the users. |
Command Line Interfaces
Libraries for creation of command line interfaces
| Name | Description | GitHub Activity |
|---|---|---|
| decline | A composable command-line parser for Scala. | |
| mainargs | A small, convenient, dependency-free library for command-line argument parsing in Scala | |
| scallop | a simple Scala CLI parsing library | |
| scopt | command line options parsing for Scala |
Image processing and image analysis
2D and 3D image processing and image analysis
| Name | Description | GitHub Activity |
|---|---|---|
| scalismo | Scalable Image Analysis and Shape Modelling | |
| scrimage | JVM - Java, Kotlin, Scala image processing library |
Sound processing and music
| Name | Description | GitHub Activity |
|---|
Functional Reactive Programming
Event streams, signals, observables, etc.
| Name | Description | GitHub Activity |
|---|---|---|
| fs2 | Compositional, streaming I/O library for Scala | |
| iteratee | Iteratees for Cats | |
| monix | Asynchronous, Reactive Programming for Scala and Scala.js. | |
| REScala | REScala - distributed and reactive programming embedded in OO and FP programs. | |
| zio | ZIO — A type-safe, composable library for async and concurrent programming in Scala | |
| vertx-lang-scala | Vert.x for Scala |
Modularization and Dependency Injection
Modularization of applications, dependency injection, etc.
| Name | Description | GitHub Activity |
|---|---|---|
| airframe | Essential Building Blocks for Scala | |
| izumi | Productivity-oriented collection of lightweight fancy stuff for Scala toolchain | |
| macwire | Zero-cost, compile-time, type-safe dependency injection library. | |
| scaldi | Lightweight Scala Dependency Injection Library | |
| jam | Incredibly simple DI Scala library. |
Distributed Systems
Libraries and frameworks for writing distributed applications.
| Name | Description | GitHub Activity |
|---|---|---|
| akka | Build highly concurrent, distributed, and resilient message-driven applications on the JVM | |
| annette | Platform to build distributed, scalable, enterprise-wide business applications | |
| finagle | A fault tolerant, protocol-agnostic RPC system | |
| poppet | Minimal, type-safe RPC Scala library. | |
| automorph | RPC client and server library for Scala |
Extensions
Scala extensions.
| Name | Description | GitHub Activity |
|---|---|---|
| Ammonite | Scala Scripting | |
| better-files | Simple, safe and intuitive Scala I/O | |
| blindsight | Blindsight is a Scala logging API with DSL based structured logging, fluent logging, semantic logging, flow logging, and context aware logging. | |
| cats | Lightweight, modular, and extensible library for functional programming. | |
| chimney | Scala library for boilerplate-free, type-safe data transformations | |
| chronoscala | A JSR-310 port of nscala_time | |
| Dsl.scala | A framework to create embedded Domain-Specific Languages in Scala | |
| each | A macro library that converts native imperative syntax to scalaz's monadic expressions | |
| eff | Eff monad for cats - https://atnos-org.github.io/eff | |
| enableIf.scala | A library that toggles Scala code at compile-time, like #if in C/C++ | |
| enumeratum | A type-safe, reflection-free, powerful enumeration implementation for Scala with exhaustive pattern match warnings and helpful integrations. | |
| log4s | High-performance SLF4J wrapper for Scala. | |
| izumi | Productivity-oriented collection of lightweight fancy stuff for Scala toolchain | |
| Monocle | Optics library for Scala | |
| nscala-time | A new Scala wrapper for Joda Time based on scala-time | |
| quicklens | Modify deeply nested case class fields | |
| refined | Refinement types for Scala | |
| scala-async | An asynchronous programming facility for Scala | |
| scala-graph | Graph for Scala is intended to provide basic graph functionality seamlessly fitting into the Scala Collection Library. Like the well known members of scala.collection, Graph for Scala is an in-memory graph library aiming at editing and traversing graphs, finding cycles etc. in a user-friendly way. | |
| scala-logging | Convenient and performant logging library for Scala wrapping SLF4J. | |
| scalameta | Library to read, analyze, transform and generate Scala programs | |
| scalaz | Principled Functional Programming in Scala | |
| scribe | The fastest logging library in the world. Built from scratch in Scala and programmatically configurable. | |
| shapeless | Generic programming for Scala | |
| simulacrum | First class syntax support for type classes in Scala | |
| squid | Squid – type-safe metaprogramming and compilation framework for Scala | |
| tinylog | tinylog is a lightweight logging framework for Java, Kotlin, Scala, and Android | |
| util | Wonderful reusable code from Twitter |
Misc
Projects that don't fit into any specific category.
| Name | Description | GitHub Activity |
|---|---|---|
| Ammonite | Scala Scripting | |
| bootzooka | Simple project to quickly start developing a Scala-based microservice or web application, without the need to write login, user registration etc. | |
| eclair | A scala implementation of the Lightning Network. | |
| fansi | Scala/Scala.js library for manipulating Fancy Ansi colored strings | |
| fs2-aws | fs2 utilities to interact with AWS | |
| mailgun4s | Mailgun API implementation in Scala | |
| managerial | A zero-dependency Scala library for managing resources monadically | |
| media4s | Scala command-line wrapper around ffmpeg, ffprobe, ImageMagick, and other tools relating to media. | |
| play-swagger | Swagger spec generator for play framework | |
| PPrint | Pretty-printing value, types and type-signatures in Scala | |
| pureconfig | A boilerplate-free library for loading configuration files | |
| service-chassis | A scala chassis to get your applications and services bootstrapped quickly | |
| spliff | Efficient diffing in Scala | |
| scountries | Scala library that provides an enumeration of ISO 3166 codes for countries, along with their subdivisions. | |
| scurl-detector | Scala library that detects and extracts URLs from text. | |
| aptus-core | A utility library aiming to simplify the Scala coding experience. |
Android
Scala libraries and wrappers for Android development.
| Name | Description | GitHub Activity |
|---|---|---|
| scaloid | Scaloid makes your Android code easy to understand and maintain. |
HTTP
Scala libraries and wrappers for HTTP clients.
| Name | Description | GitHub Activity |
|---|---|---|
| akka-http | The Streaming-first HTTP server/module of Akka | |
| reboot | Scala wrapper for the Java AsyncHttpClient. | |
| finch | Scala combinator library for building Finagle HTTP services | |
| http4s | A minimal, idiomatic Scala interface for HTTP | |
| lolhttp | An HTTP Server and Client library for Scala. | |
| requests-scala | A Scala port of the popular Python Requests HTTP client: flexible, intuitive, and straightforward to use. | |
| scalaxb | scalaxb is an XML data binding tool for Scala. | |
| sttp | The Scala HTTP client you always wanted! | |
| tapir | Rapid development of self-documenting APIs | |
| endpoints4s | Describe HTTP endpoints in Scala and derive clients, servers, and documentation | |
| frontier | A lightweight HTTP/WebSocket server built with ZIO |
Semantic Web
Scala libraries for interactions with the Web of Data, and other RDF tools.
| Name | Description | GitHub Activity |
|---|---|---|
| scowl | A Scala DSL for programming with the OWL API. |
Metrics and Monitoring
Scala libraries for gathering metrics and monitoring applications.
| Name | Description | GitHub Activity |
|---|---|---|
| metrics-scala | The scala API for Dropwizard's Metrics. |
Parsing
Scala libraries for creating parsers.
| Name | Description | GitHub Activity |
|---|---|---|
| atto | friendly little parsers | |
| fastparse | Writing Fast Parsers Fast in Scala | |
| parboiled2 | A macro-based PEG parser generator for Scala 2.10+ | |
| scala-parser-combinators | simple combinator-based parsing for Scala. formerly part of the Scala standard library, now a separate community-maintained module | |
| cats-parse | A parsing library for the cats ecosystem |
Sbt plugins
Sbt plugins to make your life easier.
| Name | Description | GitHub Activity |
|---|---|---|
| better-monadic-for | Desugaring scala for without implicit withFilters |
|
| coursier | Pure Scala Artifact Fetching | |
| mdoc | Typechecked markdown documentation for Scala | |
| sbt-api-mappings | An Sbt plugin that fills apiMappings for common Scala libraries. | |
| sbt-assembly | Deploy über-JARs. Restart processes. (port of codahale/assembly-sbt) | |
| sbt-buildinfo | I know this because build.sbt knows this. | |
| sbt-ci-release | sbt plugin to automate Sonatype releases from GitHub Actions | |
| sbt-dependency-check | SBT Plugin for OWASP DependencyCheck. Monitor your dependencies and report if there are any publicly known vulnerabilities (e.g. CVEs). :rainbow: | |
| sbt-docker | Create Docker images directly from sbt | |
| sbt-doctest | Doctest for scala | |
| sbt-ghpages | git, site and ghpages support for sbt projects. | |
| sbt-header | sbt-header is an sbt plugin for creating file headers, e.g. copyright headers | |
| sbt-hepek | Sbt plugin for rendering Scala objects to files. And more! | |
| sbt-ide-settings | SBT plugin for tweaking various IDE settings | |
| sbt-jmh | "Trust no one, bench everything." - sbt plugin for JMH (Java Microbenchmark Harness) |
truncated — full list on GitHub