PJSIP version 2.2 is released, with the focus on new PJSUA2 API, an Object Oriented API for C++, Java/Android, and Python. See the new PJSUA2 Book, a comprehensive tutorial/documentation specifically for this API, for more info.
Also Android is now supported. Apart from these, we added support for 64bit Windows, third party echo canceller for Android, iOS, Windows, etc, and closed over a hundred tickets on this release. See the Release Notes for 2.2 for more info, or head straight to the Download page to get the source code.