Top 3 Scala concurrent-programming Projects

ZIO

23 3,694 9.8 Scala

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

Project mention: 40x Faster! We rewrote our project with Rust! | reddit.com/r/rust | 2023-01-30

The one advantage Rust has over Scala is that it detects data races at compile time, and that's a big time saver if you use low level thread synchronization. However, if you write pure FP code with ZIO or Cats Effect that's basically a non-issue anyway.
futil

0 22 1.5 Scala

minimal utilities for Scala Futures
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smanikin

2 2 0.0 Scala

Scala version of Manikin

Project mention: What programming languages distinguish between “old” and “new” values? | reddit.com/r/ProgrammingLanguages | 2022-07-09

Would a library like Manikin (or rather DSL) also count?

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). The latest post mention was on 2023-01-30.