functional

Cats is a library which provides abstractions for functional programming in the Scala programming language.

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

Shapeless is a type class and dependent type based generic programming library for Scala.

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.

ZIO Test is Scala library for writing functional tests with support for Resources, Effects, Property-Based Testing, Aspects, etc.

Scalaz is a Scala library for functional programming, providing purely functional data structures to complement those from the Scala standard library

ZIO Streams provides a high-level API that abstracts the mechanism of reading and writing operations using data sources and destinations.

Vavr is an object-functional library for Java 8+

zio-test-sbt

Cats laws