This is an old revision of the document!
Current devel version will be numbered 5.0.0 and it is planned to be released at the end of 2016.
Previous devel, current stable, version was 4.4.x (released on March, 2016), see what was new in that release at:
This is a draft of new features added in devel version, manually updated, thus not always synchronized with what is new in source code repository.
A new framework (named kemi - kamailio embedded interface) was added, allowing to writing routing blocks in embedded languages such as Lua or Python: