The development of new features for next major release, Kamailio v5.1, is going to be frozen on Monday, October 16, 2017. The master branch received plenty of new features since the release of v5.0, which was out by end of February 2017.
Next release will bring at least 7 new modules (although we are expecting one or more to make it in during next days). Not really up to date, the list of new features is collected in the wiki page at:
After the freeze date, we start the testing phase, which is expected to last for 4 to 6 weeks, then we will have the first release in the 5.1 series, respectively the version 5.1.0.
Shall you have plans to include new features in v5.1, it is time to hurry up and have the commit or pull request ready by end of next Monday.
Thanks for flying Kamailio!