A curated list of awesome Scala frameworks, libraries and software. Inspired by awesome-python.

• Awesome Scala
  • Database
  • Web Frameworks
  • Authentication
  • Testing
  • JSON Manipulation
  • Science and Data Analysis
  • Big Data
  • Modularization and Dependency Injection
  • Extensions
  • Android
  • HTTP
• Contributing

Database access libraries in Scala.

• ScalikeJDBC - A tidy SQL-based DB access library for Scala developers.
• Slick - Modern database query and access library for Scala.
• Squeryl - A Scala DSL for talking with databases with minimum verbosity and maximum type safety.
• Activate - Pluggable object persistence in Scala.
• Scala ActiveRecord - ORM library for scala, inspired by ActiveRecord of Ruby on Rails.
• PostgreSQL and MySQL async - async database drivers to talk to PostgreSQL and MySQL in Scala.

Scala frameworks for web development.

• Play - Makes it easy to build scalable, fast and real-time web applications with Java & Scala.
• Skinny Framework - A full-stack web app framework upon Scalatra for rapid Development in Scala.
• Scalatra - Tiny Scala high-performance, async web framework, inspired by Sinatra.
• Spray - A suite of scala libraries for building and consuming RESTful web services on top of Akka.
• Finatra - A sinatra-inspired web framework for scala, running on top of Finagle.
• Blue Eyes - A lightweight Web 3.0 framework for Scala, featuring a purely asynchronous architecture, extremely high-performance, massive scalability, high usability, and a functional, composable design.
• Reactive - FRP and web abstractions, which can be plugged into any web framework (currently only has bindings for Lift)
• Chaos - A lightweight framework for writing REST services in Scala

Libraries for implementing authentications schemes.

• scala-oauth2-provider - OAuth 2.0 server-side implementation written in Scala.
• SecureSocial - A module that provides OAuth, OAuth2 and OpenID authentication for Play Framework applications.
• play2-auth - Play2.x Authentication and Authorization module.

Libraries for code testing.

• ScalaCheck - Property-based testing for Scala.
• ScalaTest - A testing tool for Scala and Java developers.
• Specs2 - Software Specifications for Scala.

Libraries for work with json.

• json4s - project aims to provide a single AST to be used by other scala json libraries.
• jerkson - a Scala wrapper for Jackson
• spray-json - lightweight, clean and efficient JSON implementation in Scala.
• argonaut - Purely Functional JSON in Scala.
• jackson-module-scala - Add-on module for Jackson to support Scala-specific datatypes

Libraries for scientific computing, data analysis and numerical processing.

• Breeze - Breeze is a numerical processing library for Scala.
• MLLib - Machine Learning framework for Spark
• Spire - Powerful new number types and numeric abstractions for Scala.
• Algebird - Abstract Algebra for Scala.
• FACTORIE - A toolkit for deployable probabilistic modeling, implemented as a software library in Scala.
• scala_prob - Scala embedded probabilistic programing library using delimited continuations (VERY Experimental).
• probability-monad - Probability Distribution Monad in Scala.
• Saddle - A minimalist port of Pandas to Scala

• Spark - Lightning fast cluster computing - up to 100x faster than Hadoop for iterative algorithms (memory caching) and up to 10x faster than Hadoop for single-pass MapReduce jobs. Compatible with YARN-enabled Hadoop clusters, can run on Mesos and in stand-alone mode as well.
• Scalding - A Scala binding for the Cascading abstraction of Hadoop MapReduce.
• Summingbird - An implementation of the "lambda architecture" as a software abstraction - a single API for Hadoop and Storm.
• Scrunch - A Scala wrapper for Apache Crunch which provides a framework for writing, testing, and running MapReduce pipelines.

Modularization of applications, dependency injection, etc.

• Domino - Write elegant OSGi bundle activators in Scala.
• Scaldi - Lightweight Scala Dependency Injection Library.
• MacWire - Scala Macro to generate wiring code for class instantiation. DI container replacement.
• SubCut - Scala Uniquely Bound Classes Under Traits.

Scala extensions.

• Scalaz - An extension to the core Scala library for functional programming.
• Shapeless - A type class and dependent type based generic programming library for Scala.

Scala libraries and wrappers for Android development.

• Scaloid - Less painful Android development with Scala.
• Macroid - A modular functional UI language for Android.
• Android SDK Plugin for SBT - A sbt plugin that adds tasks for developing Android applications.

Scala libraries and wrappers for HTTP clients.

• Dispatch - Library for asynchronous HTTP interaction. It provides a Scala vocabulary for Java’s async-http-client.
• Scalaxb - An XML data-binding tool for Scala that supports W3C XML Schema (xsd) and Web Services Description Language (wsdl) as the input file.
• Spray - Actors-based library for http interaction.

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.