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Cats Effect

Cats Effect is a high-performance, asynchronous, composable framework for building real-world applications in a purely functional style within the Typelevel ecosystem.

Artifacts using Cats Effect (2,151)
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1.Fs2 Core901 usages

co.fs2 » fs2-core MIT

Functional, effectful, concurrent streams for Scala
Last Release on Sep 6, 2026

2.MUnit Cats Effect713 usages

org.typelevel » munit-cats-effect Apache

munit-cats-effect
Last Release on Sep 20, 2026

3.Fs2 IO546 usages

co.fs2 » fs2-io MIT

Support for IO operations in the fs2 ecosystem
Last Release on Sep 6, 2026

4.MUnit Cats Effect 3423 usages

org.typelevel » munit-cats-effect-3 Apache

munit-cats-effect-3
Last Release on Feb 16, 2022

Relocated → org.typelevel » munit-cats-effect

5.Slick316 usages

com.typesafe.slick » slick BSD

Scala Language-Integrated Connection Kit
Last Release on Jan 31, 2025

6.Http4s Core298 usages

org.http4s » http4s-core Apache

Core http4s library for servers and clients
Last Release on Sep 30, 2026

7.Cats Effect Testkit237 usages

org.typelevel » cats-effect-testkit Apache

cats-effect-testkit
Last Release on Aug 25, 2026

8.Log4cats SLF4J205 usages

org.typelevel » log4cats-slf4j Apache

log4cats-slf4j
Last Release on Mar 12, 2026

9.ScalaCheck Effect MUnit176 usages

org.typelevel » scalacheck-effect-munit Apache

scalacheck-effect-munit
Last Release on Mar 9, 2026

10.Cats Effect Laws164 usages

org.typelevel » cats-effect-laws Apache

cats-effect-laws
Last Release on Aug 25, 2026