Apache Pekko

Provides intuitive high-level abstractions for concurrency and distributed computing, simplifying the development of robust systems, as emphasized in the project description and philosophy.

As a fork of Akka under the Apache 2.0 license, it offers a free and open-source alternative, mentioned in the README as a key differentiator from Akka's Business Source License.

Includes built-in libraries for persistence, streams, and HTTP, providing a full toolkit for distributed applications, based on the key features listed in the README.

Features fault tolerance and supervision strategies for handling failures gracefully, which is a core part of its resilience and elasticity claims.