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Standard library for the Scala Programming Language Version 3
Last Release on Mar 30, 2026
scala-library-bootstrapped
Last Release on Mar 25, 2026

Relocated → org.scala-lang » scala3-library
Clojure core environment and runtime library.
Last Release on Dec 10, 2025
Cats is a library which provides abstractions for functional programming in the Scala programming language.
Last Release on Jan 20, 2025
Cats Effect is a high-performance, asynchronous, composable framework for building real-world applications in a purely functional style within the Typelevel ecosystem.
Last Release on Mar 9, 2026
ZIO is a Type-safe, composable asynchronous and concurrent programming for Scala. ZIO lets developers quickly build applications that are highly scalable, testable, robust, resilient, resource-safe, efficient, and observable.
Last Release on May 7, 2026
ZIO Test is Scala library for writing functional tests with support for Resources, Effects, Property-Based Testing, Aspects, etc.
Last Release on May 7, 2026
Vavr (formerly called Javaslang) is an object-functional language extension to Java 8+.
Last Release on Mar 1, 2026
Shapeless is a type class and dependent type based generic programming library for Scala.
Last Release on Mar 3, 2025
Functional Extensions
Last Release on Apr 22, 2026