Whenever I come I across a Scala library I take a note of it here. This collection is neither complete nor have I used all of these libraries. It is mainly used as a point of reference if I want to find some functionality implemented in a Scala library.
neuroflow lightweight library to construct, sketch, train and evaluate Artificial Neural Networks
ThoughtWorksInc/DeepLearning.scala A DSL for creating complex neural networks
hseeberger/akka-sse Server Sent Events for Akka HTTP
ktoso/akka-raft toy project implementing RAFT on top of Akka Cluster (not prod ready)
scalapenos/stamina serialization toolkit written specifically for use with Akka Persistence.
krasserm/streamz A combinator library for integrating Functional Streams for Scala (FS), Akka Streams and Apache Camel
macroid modular functional UI language for Android
szeiger/ornate tool for building multi-page HTML sites from Markdown sources
scredis non-blocking, ultra-fast Scala Redis client built on top of Akka IO.
Koboshi resilient caching of any configuration/resources from an unreliable source
caffeine high-performance Java 8 based caching library providing a near optimal hit rate.
scalacache#caffeine facade for the most popular cache implementations, with a simple, idiomatic Scala API.
non/chain wrapper for fast concatenation/iteration.
kind-projector Compiler plugin for making type lambdas (type projections) easier to write
TwoTails Scala compiler plugin for mutual tail recursion
sbt-dotty plugin to build your application using dotty with Sbt support
miniboxing/ildl-plugin The ildl-plugin is a meta-programming technique aimed at allowing safe, custom transformations across library boundaries.
ficus Scala-friendly companion to Typesafe config
pureconfig boilerplate-free library for loading configuration files
SHocon simple pure Scala implementation of the HOCON specification
ccadllc/cedi-config Provides a safe API for parsing settings objects out of Typesafe Config.
Verizon/delorean correct and stable conversions between
tpolecat/doobie principled database access for scala
julienrf/reactivemongo-derived-codecs Compared to the ReactiveMongo’s macros, this project brings support for sealed traits ,recursive types
vectos/scala-kafka Kafka driver written in pure Scala.
slick-pg Slick extensions for PostgreSQL
slickless Shapeless HList support for Slick.
slickdroid android backend for Slick
active-slick CRUD operations for Slick 3.x projects
unicorn small Slick library for type-safe id handling
twitter/cassovary simple big graph processing library for the JVM
zalando/grafter a library to configure and wire Scala applications
hamsters mini Scala utility library that supports Validation, OK/KO Monads, Monad transformers, HLists, Union types
latr Scala macro for reasonable lazy semantics (evaluation is delayed and memoized)
mouse small companion to cats. Mouse includes enrichments for Boolean, Option, String
quicklens modify deeply nested case class fields
jeremyrsmith/patchless Patch data type for Scala and shapeless (Technically not a lens, but sort of !)
atnos-org/eff Extensible effects are an alternative to monad transformers for computing with effects in a functional way.
mpilquist/simulacrum first class syntax support for type classes in Scala
Providing instances of typeclasses
milessabin/export-hook minimal infrastructure for type class providers to support the inclusion of derived, subclass and other orphan instances in their implicit scope.
mpilquist/local-implicits: Scala compiler plugin which provides syntax for working with locally declared implicit values
Performance typeclasses runtime (imp-machinist)
non/imp macro for summoning implicit values
typelevel/machinist spire’s macros for zero-cost operator enrichment
Combining all the above
ProjectSeptemberInc/freek a freaky simple Free to combine your DSL seamlessly
aecor/liberator The goal of this library is to generate everything you need to create programs using Free monad, without boilerplate.
propensive/rapture json library is the ultimate Scala JSON library. It doesn’t really do anything with JSON itself, instead, it abstracts over the following JSON libraries (which it calls backends)
MediaMath/scala-json Compile-time JSON marshaling and abstraction for Scala and Scala.js
aishfenton/Argus Builds models from JSON Schemas
jwt-scala Scala support for JSON Web Token
ScalaTags small, fast XML/HTML/CSS construction library for Scala
Scalate Scala Template Engine
beard lightweight logicless templating engine, written in Scala and inspired by Mustache
julienrf/endpoints Scala library to define HTTP endpoints
scalaj-http simple Scala wrapper for HttpURLConnection. OAuth included.
eed3si9n/gigahorse an HTTP client for Scala with Async Http Client undernieth.
ICU International Components for Unicode
scalingua simple gettext-like internationalization (aka i18n) library for Scala
Verizon/journal fast, simple, Scala library for logging, based on SLF4J.
twitter/distributedlog. high performance replicated log service
Aerosolve A machine learning package built for humans.
anskarl/LoMRF open-source implementation of Markov Logic Networks.
getclump/clump A library for expressive and efficient service composition
adelbertc/frameless Expressive types for Spark.
findbugs4sbt static code analysis via FindBugs from within SBT
sbt-findbugs Sbt plugin for running FindBugs on Java classes
wartremover flexible Scala code linting tool
sbt-updates Sbt plugin that can check maven repositories for dependency updates
sbt-dependency-graph Sbt plugin to create a dependency graph for your project
sbt/sbt-doge Sbt plugin to aggregate tasks across subprojects and their crossScalaVersions
sbt-release release plugin for Sbt (>= 0.11.0)
sbt-tojar an Sbt plugin that enables straight-to-jar compilation of Scala files
sbt-swagger Sbt plugin for extracting Swagger & JAX-RS (jsr311) annotations from compiled classes into Swagger API models, which are then serialized to JSON for consumption with swagger-ui.
sbt-git the sbt-git plugin offers git command line features directly inside Sbt as well as allowing other plugins to make use of git.
Scalafmt opinionated code formatter for Scala
tpolecat/tut very simple documentation tool for Scala that reads Markdown files and interprets Scala code in
Verizon/sbt-rig Common build and release steps for SBT projects
ThoughtWorksInc/implicit-dependent-type a Scala compiler plugin that resolves dependent types from implicit type classes, especially useful when working with shapeless or other type-level programming libraries.
alexarchambault/coursier Pure Scala Artifact Fetching- dependency management
Verizon/sbt-blockade Warn or ban particular dependencies in a build to prevent usage.
scalafix - a Scala rewrite tool : Scalafix is a new tool to help Scala 2.x compile with Dotty.
tek/splain better implicit errors for scala
flywaydb Evolve your Database Schema easily and reliably across all your instances
Scala Clippy : syntax highlighting in the Scala compiler output!
Scala Bootstrap (base / project skeleton) This is a repository intended to serve as a starting point if you want to bootstrap a project in Scala. It could be useful if you want to start from scratch a kata or a little exercise or project.
lloydmeta/ctdi-play.g8 Compile-time DI Play template
CodelyTV/scala_bootstrap Scala Bootstrap (base / project skeleton)
ScalaMeter automate your performance testing today.
cornichon an extensible Scala DSL for testing JSON HTTP APIs.
manub/scalatest-embedded-kafka library that provides an in-memory Kafka broker to run your ScalaTest specs against. It uses Kafka 0.10.0.0 and ZooKeeper 3.4.7.
reftree automatic object tree diagrams for immutable data
ScalaBlitz lightning-fast Scala collections framework
julienrf/enum yet another enumeration toolbox for Scala, powered by shapeless.
squants the Scala API for Quantities, Units of Measure and Dimensional Analysis
Atomic References Low-level concurrency tools for Scala with equivalents for Scala.js.
scala-rainbow simple terminal output colorizing for Scala
cvogt/scala-extensions Useful extensions for the Scala standard library
wookietreiber/sbt-scaliterate generates Scala source code from a *programming book* written in Markdown.
reftree automatic object tree diagrams for immutable data
Verizon/delorean Convert Task to Future, and Future to Task
lauris/awesome-scala community driven list of useful Scala libraries, frameworks and software.
akullpp/awesome-java A curated list of awesome Java frameworks, libraries and software.