Version 0.5 of libcppa has just been released. This release brings Log4j-like logfiles to libcppa developers (must be enabled at compile time), support for user-defined communication protocols, and actor companions.
Each class using the actor_companion_mixin has such an actor companion, which provides an easy way for active non-actor objects, i.e., objects with an own thread or event loop, to send messages to/as actor. The default use case for this feature is to treat GUI elements - widgets - as actors. A more specific mixin for Qt widgets is on its way.
By the way, libcppa now has more than a thousand commits on GitHub! :-)
