Top 3 Scala actor-model Projects

Akka

33 12,921 9.4 Scala

Build highly concurrent, distributed, and resilient message-driven applications on the JVM

Project mention: Modern Async Primitives on iOS, Android, and the Web | dev.to | 2023-12-06

Kotlin also has a construct for asynchronous collections/streams. Kotlin's version of AsyncSequence is called a Flow. Just as Swift's AsyncSequence builds upon prior experience with RxSwift and Combine, Kotlin's Flow APIs build upon earlier stream/collection APIs in the JVM ecosystem: Java's RxJava, Java8 Streams, Project Reactor, and Scala's Akka.
pekko

8 1,048 9.7 Scala

Build highly concurrent, distributed, and resilient message-driven applications using Java/Scala

Project mention: Is akka still worth learning to be employable? | /r/scala | 2023-12-07

Pekko is open source, has the same API. So there's no problem there.
InfluxDB

www.influxdata.com
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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.
shardcake

3 372 7.4 Scala

Sharding and location transparency for Scala

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 2023-12-07.