twitter/finagle

A fault tolerant, protocol-agnostic RPC system

twitter/util

Wonderful reusable code from Twitter

twitter/finatra

Fast, testable, Scala services built on TwitterServer and Finagle

typelevel/spire

Powerful new number types and numeric abstractions for Scala.

freechipsproject/chisel3

Chisel 3: A Modern Hardware Design Language

twitter/twitter-server

Twitter-Server defines a template from which services at Twitter are built

scalapb/scalapb

Protocol buffer compiler for Scala.

lloydmeta/enumeratum

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

unfiltered/unfiltered

A toolkit for servicing HTTP requests in Scala

twitter/scrooge

A Thrift parser/generator

freechipsproject/firrtl

Flexible Intermediate Representation for RTL

plokhotnyuk/jsoniter-scala

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

estatico/scala-newtype

NewTypes for Scala with no runtime overhead

47degrees/sbt-microsites

An sbt plugin to create awesome microsites for your project

lemonlabsuk/scala-uri

Simple scala library for building and parsing URIs

playframework/play-json

The Play JSON library

typelevel/mouse

A small companion to cats

valskalla/odin

Fast & Functional logger in Scala

bitcoin-s/bitcoin-s

Bitcoin Implementation in Scala

cb372/cats-retry