MizuPhone has features never seen in other SIP softphones (like HD video, Remote Desktop, etc). MizuPhone helps to join the largest comunity in the world. Over 10 million existing SIP users. The VOIP client that takes the most of the newest VOIP technologies. With the help of its advanced network handling, it will work behind NAT's where other softphone's will fail. Full compatibility with your SIP infrastructure

Softphone will let you call to any SIP accounts freee and to any PST network numbers by cheap rates

Phoner is a free softphone for ISDN and VoIP telephony. An answering machine and Text-To-Speech support complete the large package.

PCBest Network provides SIP solutions for SIP Developers. From high level SIP ActiveX to low level SIP SDK, the complete SIP development solutions are giving users multipul choices to deploy their voip productions in fastest and most efficient way. PCBest Network's SIP SDK can be used to develop SIP clients or Servers(proxy, media gateway, PBX, or any other apps). Samples and libs are downloadable from PCBest Network's website(www.pcbest.net).

Plug&Phone Voicebanker.com is a ready to use softphone from pc, cd-rom, usb keychain. No installation, just download it and it runs. Come with an inclued courtesy account to make free calls. Features: easy 1 click functions(calls, conference, voicemail, hotline) multilanguage: english, french, spanish, one click to install on an usb keychain, no need of account to leave a message or join a conference, +150 local worlwide access.

ZOIPER 2.0 Free SIP and IAX is a user-friendly softphone, compatible with Asterisk or any other SIP or IAX capable system. High-quality VoIP experience with features like: SIP + IAX protocols, SIP over TCP / TLS / UDP with STUN support, Echo cancellation, DTMF tones, Multiple audio devices support, Automatic user registration, Call transfer, Hold function, Multilanguage support, Portable storage compatibility, Codecs: GSM, ulaw, alaw, speex, ilbc

VaxVoIP SIP SDK provides tools and components to quickly add SIP (Session Initiation Protocol) based IP-Telephony make and receive phone calls feature in your web pages and software applications. It delivers superior voice quality by integrating advanced digital voice processing features including acoustic echo cancellation, noise cancellation and adaptive jitter buffering.

If you own a SIP device, either SIP phone or SIP ATA is OK, which connect to your company's IPPBX or ITSP's SIP server, and sometimes you want to get cheaper and better calls through Skype or your customers is only available on Skype, in this case you must use earphone or USB phone to make or receive Skype calls. With SiSky Personal Edition, an IP phone is enough to meet your demand. A neatly tabletop will do a greatly convenience to your work.

SIP SDK - A powerful and highly versatile VoIP SDK to accelerate development of SIP applications. Our brand-new SIP SDK provides a powerful and highly versatile solution to add quickly SIP (Session Initiation Protocol) based dial and receive phone calls features in your software applications. It accelerates the development of SIP/ RTP compliant soft phone with a fully-customizable user interface and brand name.

VoIP SIP SDK - A powerful and highly versatile VoIP SDK to accelerate development of SIP applications. Our brand-new SIP SDK provides a powerful and highly versatile solution to add quickly SIP (Session Initiation Protocol) based dial and receive phone calls features in your software applications. It accelerates the development of SIP/ RTP compliant soft phone with a fully-customizable user interface and brand name.

One4000 SoftGlobalPhone, a Phone-in-the-Phone that lets you take advantage of free broadband VoIP calling and super low worldwide rates. No changing of operator. 9 ways of calling from your home phone, PDA, cellular or your PC. Download the 3D designer phone to your PC and an extra to the cellular. Use it to make free IP calls VoIP and to make regular calls at better rates than your ordinary operator. Premium voice quality.