Tracking development of pjsip, the Open Source SIP, media, and NAT traversal stack/SDK/library for Android, iOS, Windows, Linux, MacOS, RTOS, embedded, and pretty much anything, any device.
Also check PJSIP Documentation site.
Version 0.5.10.3 is now available from PJSIP download page. This release is taken from the stable branch, and contains bug-fixes only since the last 0.5.10.2.
Please visit http://www.pjsip.org/download.htm for the tarballs and release notes.
Here is where we talk about pjsip development in general, and maybe other stuff as well. For the project itself, please go to the main pjsip project website. or pjsip documentation.
PJSIP is backed by Teluu, which provides professional support, additional licensing options, and a network of qualified consultants.
pjsip blog 