tpolecat/natchez

functional tracing for cats

lemonlabsuk/scala-uri

Simple scala library for building and parsing URIs

zio/zio-quill

Compile-time Language Integrated Queries for Scala

cb372/scalacache

Simple caching in Scala

http4s/blaze

Blazing fast NIO microframework and Http Parser

typelevel/kittens

Automatic type class derivation for Cats

hammerlab/spark-tests

Utilities for writing tests that use Apache Spark.

akka/akka-persistence-cassandra

A replicated Akka Persistence journal backed by Apache Cassandra

mongodb/casbah

Casbah is now officially end-of-life (EOL).

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

reactive-streams/reactive-streams-jvm

Reactive Streams Specification for the JVM

typelevel/squants

The Scala API for Quantities, Units of Measure and Dimensional Analysis

davenverse/cats-scalacheck

Cats Instances For Scalacheck

tminglei/slick-pg

Slick extensions for PostgreSQL

scala/scala-async

An asynchronous programming facility for Scala

scalameta/scalafmt

Code formatter for Scala

blemale/scaffeine

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

scalaprops/scalaprops

property based testing library for Scala

zio/interop-reactive-streams

Interoperability Layer Between ZIO and Reactive Streams

akka/akka-grpc

Akka gRPC