Top 6 Scala Effect Projects

ZIO

59 3,991 9.5 Scala

ZIO — A type-safe, composable library for async and concurrent programming in Scala

Project mention: The golden age of Kotlin and its uncertain future | news.ycombinator.com | 2024-01-11

cats-effect

34 1,954 9.7 Scala

The pure asynchronous runtime for Scala

Project mention: A question about Http4s new major version | /r/scala | 2023-04-25

Those benchmarks are using a snapshot version of cats-effect. I don't know where that one comes from, but previously they were using a snapshot from https://github.com/typelevel/cats-effect/pull/3332 which had some issues (3.5-6581dc4, 70% performance degradation), which have since been resolved (see that PR for more info and comparative benchmarks).

InfluxDB

www.influxdata.com sponsored

Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
Eff

0 570 8.8 Scala

Eff monad for cats - https://atnos-org.github.io/eff
tofu

2 516 6.2 Scala

Functional programming toolbox

Project mention: Companies with interesting Scala projects | /r/scala | 2023-06-02

Tinkoff has a strong Scala FP presense: - https://github.com/tofu-tf/tofu - https://github.com/tofu-tf/derevo - https://github.com/tofu-tf/typed-schema

effekt

13 283 9.6 Scala

A research language with effect handlers and lightweight effect polymorphism

Project mention: What the imperative shell of an Functional Core/Imperative Shell language looks like | /r/ProgrammingLanguages | 2023-05-07

I like it. Modern languages that distinguish between pure and impure programs like Flix, Koka, and Effekt do so on the type level instead of syntactically. This has three advantages:

Parapet

0 136 2.2 Scala

A purely functional library to build distributed and event-driven systems

NOTE: The open source projects on this list are ordered by number of github stars. The number of mentions indicates repo mentiontions in the last 12 Months or since we started tracking (Dec 2020).