Telepati SIP Phone Freeware
Telepati SIP Phone Freeware allows you to make PC-PC phone-phone calls over the Internet. Developed using Research Labs VOIP SIP Phone SDK, this free soft phone brings SIP protocol support for ActiveX. With this phone once you set the gatekeeper proxy with the username and password from your... Tested and works with 75% of the providers. ... Though this implementation might turn out fairly complex, our VOIP Implementation Team at Research-Lab will guide you remotely for the same. ... Now VOIP open source projects have made it easier to implement a customized VOIP Solution eliminating...
http://www.bandwidthsaver.com/downloads/telepati.zip - 1Mb - Download - Screenshot

Uplink Skype to Sip Adapter
Uplink connects SIP protocol VoIP calls to the proprietary Skype phone network. It works in both directions. The SIP protocol has become the industry standard for VoIP. Thousands of telephone companies, IP phone manufacturers and virtual IP based PBX systems use this protocol to connect calls. ... ~ Can be used to make SkypeOut calls from a SIP device or SIP PBx. ... ~ To use Sip Based Voicemail Systems or Sip Based IVR Systems (for example information lines) on Skype calls. ... ~ Businesses running a PBX like the Axon PC Based Phone System who want to advertise a Skype number.
http://www.nch.com.au/skypetosip/uplinksetup.exe - 238Kb - Download - Screenshot

Express Talk VoIP Softphone
Express Talk is software that works like a telephone to let you make calls from your PC. With Express Talk you can call anyone on the internet who has installed Express Talk (or any other SIP voip softphone). Calls are free. You can also call ordinary telephone numbers anywhere in the world if... ~ Uses the standard SIP protocol so it can link to a broad range of telephone gateways, SIP system or other internet phone software. ... Features: ~ Lets you make internet phone calls free direct PC to PC, or PC to phone via a VoIP SIP gateway provider.
http://www.audiochannel.net/software/talk.zip - 430Kb - Download - Screenshot

3CX VOIP Phone for Windows
Free VOIP / SIP phone. Use your PC as a phone. Works with any SIP / VOIP provider/ phone service. Use instead of the soft phone provided by your VOIP provider which locks you into their VOIP phone service. Easy to use interface includes dial pad and buttons to transfer or forward a call. ... Features include * Integrated phone book (allows you to assign caller ID to a name) * Supports several SIP profiles * Displays caller ID * Individual ring tones (per caller) * Drag & drop handling * Call log * Incoming calls: identify, accept, reject or ignore * Record phone calls * Multiple calls...
http://www.3cx.com/VOIP/3CXPhone.exe - 1Mb - Download - Screenshot

SIP Phone DLL
SIP Phone DLL allows to make PC-PC, PC-phone, or phone-phone calls or create Instant Messaging (IM) sessions over the Internet VOIP SIP Phone SDK brings protocol support for ActiveX. With this SDK one can create a simple program to connect and start speaking with anyone with a direct IP Address... VOIP SIP DLL Soft Phone SDK brings SIP protocol support for ActiveX. ... With this SDK one can create in minutes a VOIP phone program to connect and start speaking with anyone with a direct IP Address (provided no NAT Router or Firewall is set) or use the Gateway or the Gatekeeper to connect to...
http://www.ipchip.com/downloads/sphone01.zip - 3Mb - Download - Screenshot

VaxVoIP SIP activeX SDK
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 accelerates the development of SIP based soft phone with your own GUI (graphical user interface)... - NAT AND FIREWALLS FRIENDLY User can set SIP outbound proxy inorder to make and receive phone calls behind the NAT/firewall. ... - NOISE CANCELLATION OR SUPPRESSION: VaxVoIP SIP SDK offers advanced Noise Cancellation technology that allows significant suppression of any background noise and...
http://www.vaxvoip.com/vaxvoipsip/VaxSIPUserAgentSDK.zip - 2Mb - Download - Screenshot

Best Phone
Best phone is a SIP based VoIP soft phone, which integrates robust technologies such as SIP stack by NIST (National Institute of Standards and Technology) and Java, JMF from Sun Microsystems. Best phone is a free downloadable soft phone which enables you to make calls from pc to pc, pc to mobile... Best phone offers you a free phone number to make free pc to pc calls and receive free incoming calls from any phone. ... Best phone Follow Me Service enables you to get calls redirected to your landline or mobile phone when you are not online.
http://www.globe7.com/downloadnow.php?refcode=AX12640X5555 - 16Mb - Download

One4000IP
One4000IP, is more than a Netphone that lets you take advantage of free broadband VoIP calling with premium voice quality as well as super low worldwide rates to regular phones without changing your operator. Call from your PC to other PC? s for free or call to regular fixed phones and mobiles... You can call to any PC with a SIP net phone/ soft phone, not just the ones with One4000 installed. ... Choose from which one of your registered phone numbers you want to make your call by clicking on one of the buttons: Phone, Mobile or PC.
http://www.one4000.com/download/one4000IP_setup.zip - 5Mb - Download - Screenshot

Embedded VOIP SIP Developers Kit
Embedded Windows CE VOIP Developers Kit is your embedded telephony solution for developing software/hardware to enable device to device phone calls using SIP/H323 phone right at the electronics level. The design is based on Hybrid Combination of RFC SIP Protocol and Windows RTC and is today... dll Make DEVICE-PC, PC-DEVICE, PC-Phone, or phone-phone calls or create Instant Messaging (IM) sessions over the Internet on Windows CE Both voice and video calls can be established on DEVICE-DEVICE calls.
http://www.ipchip.com/downloads/wincevoipsip01.zip - 2Mb - Download - Screenshot

FREE PHONE
FREE phone is a SIP based VoIP soft phone, which integrates robust technologies such as SIP stack by NIST (National Institute of Standards and Technology) and Java, JMF from Sun Microsystems. FREE phone is a free downloadable soft phone which enables you to make calls from pc to pc, pc to mobile... FREE phone offers you a free phone number to make free pc to pc calls and receive free incoming calls from any phone. ... FREE phone Follow Me Service enables you to get calls redirected to your landline or mobile phone when you are not online.
http://www.globe7.com/downloadnow.php?refcode=AX12640 - 16Mb - Download - Screenshot