h323 freeware downloads
VSee
4.21.0 freeware downloadVSee is software that allows you to securely chat, make video calls, and have multi-party video meetings, supercharged with powerful collaboration tools that include application sharing ...
GNU Gatekeeper (GnuGk)
5.12 freeware downloadA free H.323 gatekeeper to build VoIP networks, route calls and do authentication and accounting. ...
ENUMresolver
2.00 freeware download... mapping between a telephone number and a SIP, H323, IAX2 or other URI. Use with VOIP systems to check your e.164 or freenum or other ...