I have just released LuaGravity 0.6.
LuaGravity is a reactive language that implements the synchronous approach for concurrency.
It is roughly based on Esterel and FrTime, two synchronous languages, the former having an imperative style, the latter being functional.
LuaGravity is implemented as a (pure-Lua) set of runtime extensions to the Lua language.
Git Hub: http://github.com/fsantanna/luagravity
Changes in LuaGravity 0.6:
^ Several changes in the API.
+ `deactivate` and `reactivate` functionality.
+ Support for multiple LuaGravity applications in the same process.
+ Support for the *step execution model*.