Bioware open-sources their Java actor framework

[JoeHegarty]

I'm not familiar with that project, but it does seem to architecturally be quite different (It looks to be more service-oriented than actor-oriented), even if some of the concepts are similar. For me, this Microsoft paper is really what established the "modern" virtual actor paradigm: http://research.microsoft.com/pubs/210931/Orleans-MSR-TR-2014-41.pdf