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Discover the top trending Scala repositories and projects on Github. Explore the latest trends in Scala development.

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lila

♞ lichess.org: the forever free, adless and open source chess server ♞

spark

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

the-algorithm

Source code for Twitter's Recommendation Algorithm

bfg-repo-cleaner

Removes large or troublesome blobs like git-filter-branch does, but faster. And written in Scala

XiangShan

Open-source high-performance RISC-V processor

hkd4s

Higher Kinded Data for Scala 3

delta

An open-source storage framework that enables building a Lakehouse architecture with compute engines including Spark, PrestoDB, Flink, Trino, and Hive and APIs

joern

Open-source code analysis platform for C/C++/Java/Binary/Javascript/Python/Kotlin based on code property graphs. Discord https://discord.gg/vv4MH284Hc

elasticmq

In-memory message queue with an Amazon SQS-compatible interface. Runs stand-alone or embedded.

mill

Mill is a fast JVM build tool that supports Java and Scala. Mill aims to make your project’s build process performant, maintainable, and flexible

enso

Hybrid visual and textual functional programming.

mlscript

The MLscript programming language. Functional and object-oriented; structurally typed and sound; with powerful type inference. Soon to have full interop with TypeScript!

flix

The Flix Programming Language

akka

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

openwhisk

Apache OpenWhisk is an open source serverless cloud platform

magnum

A 'new look' for database access in Scala

scala3

The Scala 3 compiler, also known as Dotty.

nak

a command line tool and a web app for dealing with nostr entities

leases4s

Functional abstractions for Kubernetes leases in Scala

apalache

APALACHE: symbolic model checker for TLA+ and Quint

gatling

Modern Load Testing as Code

snowflake

Snowflake is a network service for generating unique ID numbers at high scale with some simple guarantees.

zio-apache-parquet

Scala ZIO-powered Apache Parquet library

moulin

Build multi-projects with Scala CLI

kyo

Algebraic effects for Scala 3

gluten

Gluten: Plugin to Double SparkSQL's Performance

deequ

Deequ is a library built on top of Apache Spark for defining "unit tests for data", which measure data quality in large datasets.

Vale

Compiler for the Vale programming language - http://vale.dev/

incubator-pekko

Build highly concurrent, distributed, and resilient message-driven applications using Java/Scala

gitbucket

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

os-lib

OS-Lib is a simple, flexible, high-performance Scala interface to common OS filesystem and subprocess APIs

circe

Yet another JSON library for Scala

kaitai_struct_compiler

Kaitai Struct: compiler to translate .ksy => .cpp / .cs / .dot / .go / .java / .js / .lua / .nim / .php / .pm / .py / .rb

CMAK

CMAK is a tool for managing Apache Kafka clusters

esmeta

ECMAScript Specification (ECMA-262) Metalanguage

wvlet

A flow-style query language for SQL engines

VexiiRiscv

Like VexRiscv, but, Harder, Better, Faster, Stronger

usql

usql - micro JDBC toolit for Scala 3

codepropertygraph

Code Property Graph: specification, query language, and utilities

TheHive

TheHive: a Scalable, Open Source and Free Security Incident Response Platform

gears

A strawman for a low-level async library in Scala 3.

scalameta

Library to read, analyze, transform and generate Scala programs

tasty-interpreter

Reference interpreter for TASTy, the Scala 3 interchange format

tsumugi-spark

SparkConnect Server plugin and protobuf messages for Amazon Deequ Data Quality Engine.

raise4s

Porting of the Raise DSL from the Arrow Kt Kotlin library

scalachess

Chess API written in scala. Immutable and free of side effects.

metals

Scala language server with rich IDE features 🚀

snowplow

The leader in Next-Generation Customer Data Infrastructure

ldbc

ldbc is Pure functional JDBC layer with Cats Effect 3 and Scala 3.

http4s

A minimal, idiomatic Scala interface for HTTP

playframework

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

pureconfig

A boilerplate-free library for loading configuration files

manifesto

cats

Lightweight, modular, and extensible library for functional programming.

scala-ts

🔧 Scala datamodel transpiler

incubator-streampark

StreamPark, Make stream processing easier! easy-to-use streaming application development framework and operation platform

difflicious

Scala library for readable diffs of values

chisel

Chisel: A Modern Hardware Design Language

macwire

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

chimney

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

sizegame

Compare binary sizes of canonical Hello World in 18 different languages

cats-actors

Cats Actors framework for building apps which are reactive. Cats actors uses a conceptual actor model as a higher level abstraction for concurrency.

scalajs-wasm-game-of-life

Conway's Game of Life using experimental Scala.js WebAssembly backend

Raphtory

Raphtory: A Distributed Temporal Graph Processing System

build-server-protocol

Protocol for IDEs and build tools to communicate about compile, run, test, debug and more.

FiloDB

Distributed Prometheus time series database

rocket-chip

Rocket Chip Generator

neotype

A friendly newtype library for Scala 3

indigo

An FP game engine for Scala.

bootzooka

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

scalaxb

scalaxb is an XML data binding tool for Scala.

scodec

Scala combinator library for working with binary data

lua2cpg

OBP-API

An open source RESTful API platform for banks that supports Open Banking, XS2A and PSD2 through access to accounts, transactions, counterparties, payments, entitlements and metadata - plus a host of internal banking and management APIs.

iron

Strong type constraints for Scala

Laminar

Simple, expressive, and safe UI library for Scala.js

NaxRiscv

watchlistarr

Customizable sync of Plex Watchlist to Sonarr/Radarr

aprsdroid

APRSdroid - Geo-Location for Radio Amateurs

chipyard

An Agile RISC-V SoC Design Framework with in-order cores, out-of-order cores, accelerators, and more

sbt-scalafix

sbt plugin for Scalafix

NutShell

RISC-V SoC designed by students in UCAS

geomesa

GeoMesa is a suite of tools for working with big geo-spatial data in a distributed fashion.

squery

Simple SQL queries in Scala 3

slick

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

sttp

The Scala HTTP client you always wanted!

spring-boot-scala-example

An example SpringBoot app using Scala

worms-server

Fast WoRMS name server

Ore

Repository software for Sponge plugins and Forge mods

pillars

Scala 3 backend application base

OpenComputers

Home of the OpenComputers mod for Minecraft.

cats-effect

The pure asynchronous runtime for Scala

coursier

Pure Scala Artifact Fetching

cats-parse

A parsing library for the cats ecosystem

sharaf

Minimalistic Scala 3 web framework

sbt-projectmatrix

otel4s

An OpenTelemetry library for Scala based on Cats-Effect

tasty-query

better-tostring

(b2s) Scala compiler plugin for better default toString.

simple-sub

Alternative algorithm for algebraic subtyping.

twitter

Scala, Java, Python

apache

Java, HTML, JavaScript

typelevel

Scala, Shell, Nix

scala

Scala, Shell, HTML

twitter-archive

Scala, Java, JavaScript

akka

Scala, Java, CSS

sbt

Scala, Java, HTML

playframework

Scala, Java, CSS

prisma

TypeScript, JavaScript, Rust

lichess-org

Rust, TypeScript, Scala

softwaremill

Scala, Java, TypeScript

zio

Scala, JavaScript, TypeScript

yahoo

JavaScript, Java, Python

com-lihaoyi

rtyley

Java, Scala, Python

databricks

Python, Scala, HCL

gitbucket

Scala, Shell, Java

guardian

Scala, JavaScript, TypeScript

chipsalliance

Scala, Python, SystemVerilog

delta-io

Rust, Scala, MDX

enso-org

JavaScript, Rust, HTML

snowplow

Scala, Shell, Go

lhartikk

JavaScript, Java, Python

gatling

Scala, Java, HTML

ucb-bar

Scala, C, Python

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