tototoshi/scala-csv

CSV Reader/Writer for Scala

scalafx/scalafx

ScalaFX simplifies creation of JavaFX-based user interfaces in Scala

scala/scala-parser-combinators

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

shadaj/slinky

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

jwt-scala/jwt-scala

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

raquo/laminar

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

chipsalliance/firrtl

Flexible Intermediate Representation for RTL

bkirwi/decline

A composable command-line parser for Scala.

com-lihaoyi/os-lib

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

hseeberger/akka-http-json

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

wvlet/airframe

Essential Building Blocks for Scala

etorreborre/specs2

Software Specifications for Scala

squeryl/squeryl

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

com-lihaoyi/upickle

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

7mind/izumi

Productivity-oriented collection of lightweight fancy stuff for Scala toolchain

scalate/scalate

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

typelevel/cats-collections

Data structures for pure functional programming in Scala

scalacenter/scalafix

Refactoring and linting tool for Scala

enragedginger/akka-quartz-scheduler

Quartz Extension and utilities for cron-style scheduling in Akka

atnos-org/eff

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