twitter/finatra

Fast, testable, Scala services built on TwitterServer and Finagle

lagom/lagom

Reactive Microservices for the JVM

trace4cats/trace4cats

Distributed app tracing implementation in pure scala using cats-effect

typelevel/shapeless-3

Generic programming for Scala

scala-js/scala-js-java-securerandom

Implementation of java.security.SecureRandom for Scala.js in browsers and Node.js

scalapb/scalapb-json4s

Json/Protobuf convertors for ScalaPB

suzaku-io/boopickle

Binary serialization library for efficient network communication

zio/interop-reactive-streams

Interoperability Layer Between ZIO and Reactive Streams

kamon-io/kamon

Distributed Tracing, Metrics and Context Propagation for applications running on the JVM

blemale/scaffeine

Thin Scala wrapper for Caffeine (https://github.com/ben-manes/caffeine)

shadaj/slinky

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

typelevel/cats-testkit-scalatest

Cats Testkit for Scalatest

scala-graph/scala-graph

Graph for Scala is intended to provide basic graph functionality seamlessly fitting into the Scala Collection Library. Like the well known members of scala.collection, Graph for Scala is an in-memory graph library aiming at editing and traversing graphs, finding cycles etc. in a user-friendly way.

softwaremill/macwire

Lightweight and Nonintrusive Scala Dependency Injection Library

delta-io/delta

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

databricks/spark-xml

XML data source for Spark SQL and DataFrames

eed3si9n/verify

Scala Verify is a minimal testing framework for Scala. Trust, but verify.

datastax/spark-cassandra-connector

DataStax Connector for Apache Spark to Apache Cassandra

sbt/sbt-header

sbt-header is an sbt plugin for creating file headers, e.g. copyright headers

ceedubs/ficus

Scala-friendly companion to Typesafe config - moved to https://github.com/iheartradio/ficus