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.
The 0.7.0 series is a major development over the stable series, with the addition of ICE and Symbian port. This release contains several bug fixes found after the last release candidates.
Please find the detailed information in the PJSIP Download Page.
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 
One response to “Version 0.7.0 is released”
PJSIP version 0.7.0 is released with ICE and Symbian support.
What ever the way you plan to go about testing, using the PJSIP, the best place to start is at Getting started document page. It is well written for the purpose and not boringly long.There is also a mailing list, TRAC development site and….. the blog…