Hi all, today at PrivateWave Italia S.p.A, italian company engaged in developing technologies for privacy protection and information security in voice telecommunications where i am CTO, we release ZORG, a new open source ZRTP protocol implementation available for download from http://www.zrtp.org .
ZORG has been originally developed and implemented in PrivateWave’s PrivateGSM voice encryption products available for the following platforms: Blackberry, Nokia and iOS (iPhone) .
Zorg C++ has been integrated with PJSIP open source VoIP SDK  and it’s provided as integration patch against PJSIP 1.8.5. It has been tested on iPhone, Symbian, Windows, Linux and Mac OS X.
Zorg Java has been integrated within a custom version of MJSIP  open source SDK on Blackberry platform and it includes memory usage optimizations required to reduce at minimum garbage collector activity.
Both platforms have separated and modular cryptographic back-ends so that the cryptographic algorithms implementation could be easily swapped with other ones.
ZORG is licensed under GNU AGPL and source code is available on github at https://github.com/privatewave/ZORG .
We are releasing it under open source and in coherence with our approach to security  as we really hope that it can be useful for the open source ecosystem to create new voice encryption systems in support of freedom of speech.
More than 20 pjsip-based open source VoIP encryption software and several written in Java could directly benefit from ZORG release.
We would be happy to receive proposal of cooperation, new integration, new cryptographic back-ends, bug scouting and whatever useful to improve and let ZRTP affirm as voice encryption standard.
Zorg is available from http://www.zrtp.org .