The OSP Toolkit is a client side implementation of the ETSI OSP VoIP Peering protocol (ETSI TS 101 321). The OSP Toolkit project was begun in 1998 and the code has been incorporated into many commercial and open source VoIP products.
KAMAILIO (OpenSER) - robust, secure and scalable Open Source (GPL) SIP (RFC3261) server implementation with large features set (over 90 extension modules). As of May 2009, sourcecode is hosted by GIT repository at http://sip-router.org
BeepagePHP provides a PHP-based web client to the beepage client/server paging system.
Beepage is a Unix-based, Internet-aware text paging system that implements the Telocator Alphanumeric Protocol (TAP).
Sourcecode is hosted at http://git.io/rgikgg
An open project for a number of activex controls for use in the Windows environment. The controls have been sold commerical before by Eurosource (http://www.eurosource.se) but are now free complete with source code.
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