purplekingdomgames/indigo   0.22.0

An FP game engine for Scala.

scallop/scallop   6.0.0

a simple Scala CLI parsing library

guardian/grid   1.7.16

The Guardian’s image management system

bkirwi/decline   2.6.2

A composable command-line parser for Scala.

scala/scala-parser-combinators   2.4.0

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

tototoshi/scala-csv   2.0.0

CSV Reader/Writer for Scala

jwt-scala/jwt-scala   11.0.4

JWT support for Scala. Bonus extensions for Play, Play JSON, Json4s, Circe, uPickle, Spray and Argonaut

com-lihaoyi/upickle   4.4.3

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

shadaj/slinky   0.7.5

Write Scala.js React apps just like you would in ES6

testcontainers/testcontainers-scala   0.44.1

Docker containers for testing in scala

scoverage/sbt-scoverage   2.4.4

sbt plugin for scoverage

sbt/sbt-release   1.5.0

A release plugin for sbt

wvlet/airframe   2026.2.2

Essential Building Blocks for Scala

suzaku-io/diode   1.1.14

Scala library for managing immutable application model

com-lihaoyi/requests-scala   0.9.3

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

apache/livy   0.9.0-incubating

Apache Livy is an open source REST interface for interacting with Apache Spark from anywhere.

rbmhtechnology/eventuate   0.10

Global-scale event sourcing and event collaboration with causal consistency (This project is in maintenance mode. Only critical bugs will be fixed, but there is no more feature development.).

frees-io/freestyle   0.8.2

A cohesive & pragmatic framework of FP centric Scala libraries

hseeberger/akka-http-json   1.39.2

Integrate some of the best JSON libs in Scala with Akka HTTP

stanch/reftree   1.5.0

Automatically generated diagrams and animations for Scala data structures