Scala

akka-persistence-gcp-datastore is a journal and snapshot store plugin for akka-persistence using google cloud firestore in datastore mode.

The Anorm database library

Clickhouse Scala Client with Reactive Streams support

The Couchbase Monorepo for JVM Clients: Java, Scala, io-core…

Functional JDBC layer for Scala.

Elasticsearch Scala Client - Reactive, Non Blocking, Type Safe, HTTP Client

Scala etcd client implementing V3 APIs

A Future-free Fs2 native pure FP Redis client

None

Scala lightweight, type-safe, asynchronous driver for neo4j

Idiomatic, typesafe, and reactive Scala client for Apache Pulsar

Compile-time Language Integrated Queries for Scala

Non-blocking, Reactive MongoDB Driver for Scala

Non-blocking, Reactive Redis driver for Scala (with Sentinel support)

Performant database access in Scala

Scala GraphQL implementation

Type-safe data migration tool for Slick, Git and beyond.

Type-Safe framework for defining, modifying, and querying SQL databases

A tidy SQL-based DB access library for Scala developers. This library naturally wraps JDBC APIs and provides you easy-to-use APIs.

Simpler DynamoDB access for Scala

Slick (Scala Language Integrated Connection Kit) is a modern database query and access library for Scala

Slick extensions for PostgreSQL

Simple SQL queries in Scala 3

A Scala DSL for talking with databases with minimum verbosity and maximum type safety

Molecule translates custom Scala code to database queries for multiple databases.

A ZIO-based redis client

A data access library for Scala + Postgres.

Highly available distributed strong eventual consistent and sequentially consistent storage with feeds, sorting and search

ScalaFX simplifies creation of JavaFX-based user interfaces in Scala

Tiny High Performance HTTP Server for Scala

Cask: a Scala HTTP micro-framework. Cask makes it easy to set up a website, backend server, or REST API using Scala

Fast, testable, Scala services built on TwitterServer and Finagle

Lift Framework

The Community Maintained High Velocity Web Framework For Java and Scala.

Facebook's React on Scala.JS

Tiny Scala high-performance, async web framework, inspired by Sinatra

Minimalistic Scala 3 web framework

A toolkit for servicing HTTP requests in Scala

Next generation user interface and application development in Scala and Scala.js for web, mobile, and desktop.

Reactive data-binding for Scala

Scala framework for building beautiful and maintainable web applications.

Vert.x for Scala

Compositional, streaming I/O library for Scala

Iteratees for Cats

Asynchronous, Reactive Programming for Scala and Scala.js.

REScala - distributed and reactive programming embedded in OO and FP programs.

ZIO — A type-safe, composable library for async and concurrent programming in Scala

Minimal, idiomatic, customizable validation Scala library.

Scala library for boilerplate-free validation

GNU Gettext .po file loader for Scala

Simple play module for authenticating against Google

Security library for Play framework 2 in Java and Scala: OAuth, CAS, SAML, OpenID Connect, LDAP, JWT...

OAuth 2.0 server-side implementation written in Scala

Cryptographic primitives for Scala

Extensible JOSE library for Scala

Bencher - Continuous Benchmarking

Testing tool in Scala for HTTP JSON API

Modern Load Testing as Code

The super light testing library for Scala and Scala.js

Mockito for Scala language

Scala testing library with actionable errors and extensible APIs

Property-based testing for Scala

Native Scala mocking framework

property based testing library for Scala

A testing tool for Scala and Java developers

Software Specifications for Scala

Mutation testing for Scala

A test framework that runs everything in parallel.

Docker containers for testing in scala

A simple testing framework for Scala

Purely functional JSON parser and library in scala.

Yet another JSON library for Scala

A scala diff/patch library for Json

Add-on module for Jackson (https://github.com/FasterXML/jackson) to support Scala-specific datatypes

Jawn is for parsing jay-sawn (JSON)

JSON library

Scala macros for compile-time generation of safe and ultra-fast JSON codecs + circe booster

JSON typeclasses that know the difference between null and absent fields

The Play JSON library

Fast JSON parser/generator for Scala

A lightweight, clean and simple JSON implementation in Scala

Stupid simple Scala 3 library for writing and reading JSON

Fast, secure JSON library with tight ZIO integration.

Efficient CBOR and JSON (de)serialization in Scala

Avro schema generation and serialization / deserialization for Scala

Scala extensions for the Kryo serialization library

Protocol buffer compiler for Scala.

Scala combinator library for working with binary data

A Thrift parser/generator

uPickle: a simple, fast, dependency-free JSON & Binary (MessagePack) serialization library for Scala

Lightweight and fast serialization library for Scala 2/3 based on Protocol Buffers with macros

CSV handling library for Scala

CSV Reader/Writer for Scala

Functional, stream-based CSV processor for Scala

Abstract Algebra for Scala

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 is/was a numerical processing library for Scala.

doddle-model: machine learning in Scala.

A dimensional analysis library based on dependent types

LoMRF is an open-source implementation of Markov Logic Networks

Purely functional genetic algorithms for multi-objective optimisation

numsca is numpy for scala

An ONNX (Open Neural Network eXchange) API and backend for typeful, functional deep learning and classical machine learning in Scala 3

Workflow engine for exploration of simulation models using high throughput computing

Optimus is a mathematical programming library for Scala.

Rings: efficient JVM library for polynomial rings

Statistical Machine Intelligence & Learning Engine

Powerful new number types and numeric abstractions for Scala.

The Scala API for Quantities, Units of Measure and Dimensional Analysis

Web-based notebook that enables data-driven, interactive data analytics and collaborative documents with SQL, Scala and more.

State of the Art Natural Language Processing

Open source Scala library that provides data structures for vectors and matrices

Apache Flink

Scala library for accessing various file, batch systems, job schedulers and grid middlewares.

Mirror of Apache Kafka

Alpakka Kafka connector - Alpakka is a Reactive Enterprise Integration library for Java and Scala, based on Reactive Streams and Akka.

A Scala API for Apache Beam and Google Cloud Dataflow.

Apache Spark - A unified analytics engine for large-scale data processing

A schema-aware Scala library for data transformation

Low-code tool for automating actions on real time data Stream processing for the users.

A composable command-line parser for Scala.

A small, convenient, dependency-free library for command-line argument parsing in Scala

a simple Scala CLI parsing library

command line options parsing for Scala

Scalable Image Analysis and Shape Modelling

JVM - Java, Kotlin, Scala image processing library

Essential Building Blocks for Scala

Zero-cost, compile-time, type-safe dependency injection library.

Lightweight Scala Dependency Injection Library

Incredibly simple DI Scala library.

Productivity-oriented collection of lightweight fancy stuff for Scala toolchain

Simple, safe and intuitive Scala I/O

Blindsight is a Scala logging API with DSL based structured logging, fluent logging, semantic logging, flow logging, and context aware logging.

Lightweight, modular, and extensible library for functional programming.

Scala library for boilerplate-free, type-safe data transformations

A JSR-310 port of nscala_time

A framework to create embedded Domain-Specific Languages in Scala

A macro library that converts native imperative syntax to scalaz's monadic expressions

Eff monad for cats - https://atnos-org.github.io/eff

A library that toggles Scala code at compile-time, like #if in C/C++

A type-safe, reflection-free, powerful enumeration implementation for Scala with exhaustive pattern match warnings and helpful integrations.

High-performance SLF4J wrapper for Scala.

Optics library for Scala

A new Scala wrapper for Joda Time based on scala-time

Modify deeply nested case class fields

Refinement types for Scala

An asynchronous programming facility for Scala

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.

Convenient and performant logging library for Scala wrapping SLF4J.

Library to read, analyze, transform and generate Scala programs

Principled Functional Programming in Scala

The fastest logging library in the world. Built from scratch in Scala and programmatically configurable.

Generic programming for Scala

First class syntax support for type classes in Scala

Squid – type-safe metaprogramming and compilation framework for Scala

tinylog is a lightweight logging framework for Java, Kotlin, Scala, and Android

Wonderful reusable code from Twitter

Build highly concurrent, distributed, and resilient message-driven applications on the JVM

Platform to build distributed, scalable, enterprise-wide business applications

A fault tolerant, protocol-agnostic RPC system

Minimal, type-safe RPC Scala library.

RPC client and server library for Scala

Scala Scripting

Simple project to quickly start developing a Scala-based microservice or web application, without the need to write login, user registration etc.

A scala implementation of the Lightning Network.

Scala/Scala.js library for manipulating Fancy Ansi colored strings

fs2 utilities to interact with AWS

Mailgun API implementation in Scala

A zero-dependency Scala library for managing resources monadically

Scala command-line wrapper around ffmpeg, ffprobe, ImageMagick, and other tools relating to media.

Swagger spec generator for play framework

Pretty-printing value, types and type-signatures in Scala

A boilerplate-free library for loading configuration files

A scala chassis to get your applications and services bootstrapped quickly

Efficient diffing in Scala

Scala library that provides an enumeration of ISO 3166 codes for countries, along with their subdivisions.

Scala library that detects and extracts URLs from text.

A utility library aiming to simplify the Scala coding experience.

Scaloid makes your Android code easy to understand and maintain.

The Streaming-first HTTP server/module of Akka

Scala wrapper for the Java AsyncHttpClient.

Scala combinator library for building Finagle HTTP services

A minimal, idiomatic Scala interface for HTTP

An HTTP Server and Client library for Scala.

A Scala port of the popular Python Requests HTTP client: flexible, intuitive, and straightforward to use.

scalaxb is an XML data binding tool for Scala.

The Scala HTTP client you always wanted!

Rapid development of self-documenting APIs

Describe HTTP endpoints in Scala and derive clients, servers, and documentation

A lightweight HTTP/WebSocket server built with ZIO

A Scala DSL for programming with the OWL API.

The scala API for Dropwizard's Metrics.

friendly little parsers

Writing Fast Parsers Fast in Scala

A macro-based PEG parser generator for Scala 2.10+

simple combinator-based parsing for Scala. formerly part of the Scala standard library, now a separate community-maintained module

A parsing library for the cats ecosystem

Desugaring scala for without implicit withFilters

Typechecked markdown documentation for Scala

An Sbt plugin that fills apiMappings for common Scala libraries.

Deploy über-JARs. Restart processes. (port of codahale/assembly-sbt)

I know this because build.sbt knows this.

sbt plugin to automate Sonatype releases from GitHub Actions

SBT Plugin for OWASP DependencyCheck. Monitor your dependencies and report if there are any publicly known vulnerabilities (e.g. CVEs).

Create Docker images directly from sbt

Doctest for scala

git, site and ghpages support for sbt projects.

sbt-header is an sbt plugin for creating file headers, e.g. copyright headers

Sbt plugin for rendering Scala objects to files. And more!

SBT plugin for tweaking various IDE settings

"Trust no one, bench everything." - sbt plugin for JMH (Java Microbenchmark Harness)

An sbt plugin to create awesome microsites for your project

A tool for catching binary incompatibility in Scala

sbt Native Packager

A sbt plugin for creating distributable Scala packages.

PGP plugin for sbt

A release plugin for sbt

A Sbt plugin that configures source mapping for Scala.js projects hosted on Github

sbt plugin for Scalafmt

sbt plugin for scoverage

Site generation for sbt

A sbt plugin for publishing Scala/Java projects to the Maven central.

sbt plugin to create a unified Scaladoc or Javadoc API document across multiple subprojects.

sbt plugin that can check Maven and Ivy repositories for dependency updates

Plugin for sbt to create Eclipse project definitions

better implicit errors for scala

Servlet support for sbt

A git plugin for sbt

Pure Scala Artifact Fetching

Bloop is a build server and CLI tool to compile, test and run Scala fast from any editor or build tool.

dregex is a Java library that implements a regular expression engine using deterministic finite automata (DFA). It supports some Perl-style features and yet retains linear matching time, and also offers set operations.

Scala macro that generates ultra-fast string interpolators.

Extremely fast string formatting

A Git platform powered by Scala with easy installation, high extensibility & GitHub API compatibility

a command line tool to apply templates defined on GitHub

Scala language server with rich IDE features

Mill is a fast JVM build tool that supports Java and Scala. 2-3x faster than Gradle and 5-10x faster than Maven for common workflows, Mill aims to make your project’s build process performant, maintainable, and flexible

sbt, the interactive build tool

Refactoring and linting tool for Scala

Scala source code formatter

Scala compiler plugin for static code analysis

Flexible Scala code linting tool

Scala2PlantUML generates PlantUML diagrams from Scala code.

A Scala library for scraping content from HTML pages

XML Streaming for Scala including FS2/cats support

Efficient and expressive XML data-binding library for Scala

Site and E-book Generator and Customizable Text Markup Transformer for sbt, Scala and Scala.js

Scala.js, the Scala to JavaScript compiler

Quartz Extension and utilities for cron-style scheduling in Akka

ScalaTags is a small XML/HTML construction library for Scala.

Scalate is a Scala based template engine which supports HAML, Mustache and JSP, Erb and Velocity style syntaxes.

Twirl is Play's default template engine

Typesafe HTML templates and static site generator in pure Scala

GeoTrellis is a geographic data processing engine for high performance applications.

Scala and Spark library focused on reading OpenStreetMap Pbf files.

RTree2D is a 2D immutable R-tree for ultra-fast nearest and intersection queries in plane and spherical coordinates

a scala library with primitives to build applications using the SpatioTemporal Asset Catalogs specification

A STAC/OGC API Features Web Service

A Scala Kubernetes client library

repo of sample Scala library usage, written in Chinese

A step-by-step guide to develop an application using Clean Architecture in Scala.

A small project aimed at learning Scala on intermediate level by experimenting with Cellular Automata

A curated list of awesome Scala tools and resources.

Awesome lists are a very popular way to curate high quality resources. We extract lists of links from markdown files and present them in a structured way.

Clojure is a dynamic, functional, general-purpose programming language that is a dialect of the Lisp programming language family.

Covers type classes, functors, applicatives, monads, monad transformers, free monad