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SIPfoundry - http://www.sipfoundry.org/
An international open source community providing VoIP solutions and technology based on the SIP standard. |
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FirstHand Technologies - http://www.firsthandtech.com/
Client and server software developer for service providers and telecom equipment vendors, to address enterprise mobility markets. |
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VoIP User - http://www.voipuser.org
Consumer guide and forum. Also has software phone downloads and links to service providers. |
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Voice System - http://www.voice-sistem.ro
Design, consultancy and development for SIP Express Router (SER) servers. |
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Brekeke Software - http://www.brekeke.com/
Products for small to medium sized offices and a server database. |