Typelevel Native
Get closer to bare metal with the Typelevel stack on Scala Native. Make fast, lightweight CLI apps with decline, FS2, and http4s. Learn more about Typelevel Native in the introductory blog post.
case-insensitive
A case-insensitive string for Scala
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Cats
A library intended to provide abstractions for functional programming in Scala, leveraging its unique features. Design goals are approachability, modularity, documentation and efficiency.
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Cats Collections
Data structures that facilitate pure functional programming with cats
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Cats-Effect
The IO Monad for Scala, plus type classes for general effect types.
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Cats MTL
Monad transformers made easy
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cats-parse
A parsing library for the cats ecosystem
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cats-stm
A STM implementation for Cats Effect
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Cats Tagless
A library of utilities for tagless final algebras
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Cats-Time
Instances for Cats Typeclasses for Java 8 Time
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Circe
Yet another JSON library for Scala
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Ciris
Functional Configurations for Scala
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coulomb
A statically typed unit analysis library for Scala
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decline
A composable command-line parser for Scala.
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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.
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edomata
Event-driven automata for Scala, Scala.js and scala native. This library provides purely functional state machines that can be used to create event sourced and/or CQRS style applications. It also includes production ready backends.
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eff
Extensible effects are an alternative to monad transformers for computing with effects in a functional way. This library is based on the “free-er” monad and an “open union” of effects described by Oleg Kiselyov in “Freer monads, more extensible effects”
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fabric
Object-Notation Abstraction for JSON, binary, HOCON, etc.
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fs2-data
Parse and transform data (CBOR, CSV, JSON, XML) in a streaming manner
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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).
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Grackle
Functional GraphQL server for the Typelevel stack
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http4s
A typeful, purely functional HTTP library for client and server applications
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jawn-fs2
Integration of jawn and fs2 for streaming, incremental JSON parsing
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keypool
A Keyed Pool Implementation for Scala
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Kittens
Automatic type class derivation
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Lepus
Purely functional, non-blocking RabbitMQ client for scala, scala js and scala native built on top of fs2.
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literally
Compile time validation of literal values built from strings
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log4cats
Logging Tools For Interaction with cats-effect
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Monocle
Optics library offering a simple yet powerful API to access and transform immutable data
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Mouse
Enrichments to standard library classes to ease functional programming
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Natchez
functional tracing for cats
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otel4s
An OpenTelemetry library based on cats-effect
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parsley-cats
The parsley-cats library exposes Cats instances for Parsley parsing library.
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refined
Tools for refining types with type-level predicates which constrain the set of values described by the refined type, for example restricting to positive or negative numbers.
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ScalaCheck
ScalaCheck is a library for automated property-based testing. It contains generators for randomized test data and combinators for properties.
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scalacheck-shapeless
Automatic derivation for ScalaCheck
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scodec
scodec is a combinator library for working with binary data. It focuses on contract-first and pure functional encoding and decoding of binary data and provides integration with shapeless.
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Scoverage
Code coverage tool for Scala
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Shapeless
Shapeless is a generic programming library. Starting with implementations of Scrap your boilerplate and higher rank polymorphism in Scala, it quickly grew to provide advanced abstract tools like heterogenous lists and automatic instance derivation for type classes.
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simulacrum
First-class syntax for type classes
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Skunk
A data access library for Scala + Postgres
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specs2
specs2 is a library for writing executable software specifications, aiming for conciseness, readability and extensibility.
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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.
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Squants
The Scala API for Quantities, Units of Measure and Dimensional Analysis
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Twiddles
Micro-library for building effectful protocols
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typelevel-nix
Development tools for Typelevel projects
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upperbound
A purely functional, interval based rate limiter
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vault
Type-safe, persistent storage for values of arbitrary types
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