Projects

case-insensitive

A case-insensitive string for Scala

catbird

Cats instances for various Twitter Open Source Scala projects

Cats

A library intended to provide abstractions for functional programming in Scala, leveraging its unique features. Design goals are approachability, modularity, documentation and efficiency.

Cats Collections

Data structures that facilitate pure functional programming with cats

Cats-Effect

The IO Monad for Scala, plus type classes for general effect types.

Cats MTL

Monad transformers made easy

cats-parse

A parsing library for the cats ecosystem

Cats Tagless

A library of utilities for tagless final algebras

Cats-Time

Instances for Cats Typeclasses for Java 8 Time

discipline

Originally intended for internal use in spire, this library helps libraries declaring type classes to precisely state the laws which instances need to satisfy, and takes care of not checking derived laws multiple times.

fabric

Object-Notation Abstraction for JSON, binary, HOCON, etc.

Frameless

Frameless is a library for working with Spark using more expressive types.

fs2-grpc

gRPC implementation for FS2/cats-effect

fs2

FS2 is a library for purely functional, effectful, and polymorphic stream processing library in the Scala programming language. Its design goals are compositionality, expressiveness, resource safety, and speed. The name is a modified acronym for Functional Streams for Scala (FSS, or FS2).

jawn-fs2

Integration of jawn and fs2 for streaming, incremental JSON parsing

keypool

A Keyed Pool Implementation for Scala

kind-projector

Plugin for nicer type-lambda syntax

Kittens

Automatic type class derivation

log4cats

Logging Tools For Interaction with cats-effect

Mouse

Enrichments to standard library classes to ease functional programming

otel4s

An OpenTelemetry library based on cats-effect

ScalaCheck

ScalaCheck is a library for automated property-based testing. It contains generators for randomized test data and combinators for properties.

simulacrum

First-class syntax for type classes

Simulacrum Scalafix

Simulacrum as Scalafix rules

spire

Spire is a numeric library for Scala which is intended to be generic, fast, and precise. Using features such as specialization, macros, type classes, and implicits, Spire works hard to defy conventional wisdom around performance and precision trade-offs.

Squants

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

typelevel.g8

A Giter8 template for sbt-typelevel

typelevel-nix

Development tools for Typelevel projects

vault

Type-safe, persistent storage for values of arbitrary types