QT and PJSIP based minimalistic SIP Client
https://github.com/downloads/bigbn/Telesk/telesk_0.2.0-precise_i386.deb - Ubuntu 12.04(i686) deb package
https://github.com/downloads/bigbn/Telesk/telesk_setup_0.2.0.exe - Windows(x86) installer
You need PyQt4 and python2 installed to run Telesk.
Currently supported only i686 and x86_64 systems. Also available x86 build wor Windows. (to run on another platform, u need to compile PJSIP on that platform).
Currently only English, Russian and Ukrainian languages available.
The team is looking for users having the necessary knowledge to translate, finding and fixing bugs, build packages for other popular distributions, if you're interested please join.