Open source server powering lichess.org, a free, ad-free online chess platform with realtime games, analysis, and tournaments.
Open-source high-performance RISC-V processor core written in Chisel, developed by the XiangShan project.
Open-source platform that builds code property graphs from source, bytecode, and binaries for querying vulnerabilities with a Scala DSL.
Self-hosted Git web platform written in Scala, offering repository hosting, issues, pull requests, and wiki.
Open-source load testing tool where performance test scenarios are written as code in Java, JavaScript, TypeScript, Kotlin, or Scala.
Apache OpenWhisk is an open source serverless cloud platform
Tiny Scala high-performance, async web framework, inspired by Sinatra
High performance data store solution
Scientific workflow engine designed for simplicity & scalability. Trivially transition between one off use cases to massive scale production environments
Scala macros for compile-time generation of safe and ultra-fast JSON codecs + circe booster
Rudder is a configuration and security automation platform. Manage your Cloud, hybrid or on-premises infrastructure in a simple, scalable and dynamic way.
A platform to build and run apps that are elastic, agile, and resilient. SDK, libraries, and hosted environments.
State of the Art Natural Language Processing
An open source RESTful API platform for banks that supports Open Banking, XS2A, PSD2 and Open Finance through access to accounts, transactions, counterparties, payments, entitlements and metadata - plus a host of internal banking and management APIs.
Build highly concurrent, distributed, and resilient message-driven applications using Java/Scala
MLeap: Deploy ML Pipelines to Production
Code formatter for Scala
GeoTrellis is a geographic data processing engine for high performance applications.
Scala library for boilerplate-free, type-safe data transformations
Library to read, analyze, transform and generate Scala programs
Chronon is a data platform for serving for AI/ML applications.
This repository contains the development code for sparkMeasure, an Apache Spark performance analysis and troubleshooting library. It simplifies collecting, aggregating, and exporting Spark task/stage metrics, and is designed for practical use by developers and data engineers in interactive analysis, testing, and production monitoring workflows.
simple combinator-based parsing for Scala. formerly part of the Scala standard library, now a separate community-maintained module
Eff monad for cats - https://atnos-org.github.io/eff
Orbeon Forms - Build, run, and manage web forms on-premises or in the cloud.
Ergo protocol description & reference client implementation
(NSCSCC 2026) A high-performance out-of-order superscalar LA32R processor for AI Agents