• Gizmo Call
  Free calls up to five or ten minutes a day anywhere in the world. Requires you to download and install a plugin (Windows only)
  in cool web services with call free phone voip by 7 users
• Lycos Phone Beta
  Voice over IP that includes free unlimited incoming calls and faxes (to a US number). Windows only presently but promising Linux, Mac OS, Palm OS and Pocket PC in future.
  in Public bookmarks with fax phone voip
• PC to Phone Calls with Free Softphone
  in mobile with call international phone voip
• SightSpeed
  According to Lifehacker offers better video calling than Skype
  in cool web services with conferencing video voice voip by 13 users
• SIPDiscount
  Low Cost VoIP Calls (free calls to phones in UK, US, France and others)
  Cheap international VOIP calls. SIPDiscount delivers your call to the PSTN networks with the latest technologies at the best possible rates. Setup your SIP/IAX device for SIPDiscount and start saving big time!
  call calls download free sip voip
  in Public bookmarks with voip
• SIPfoundry Open Source PBX, VoIP Solutions, and VoIP Phones
  Windows and Linux only
  SIPfoundry - sipXecs Open Source IP PBX for Unified Communications
  asterisk communications freeswitch open pbx sip source trunking unified
  in software with opensource phone sip voip by 3 users
• Welcome to babble.net
  UK Internet telephony company
  in money with sip voip

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