PC-Telephone
Make FREE pc-to-pc, pc-pc and cheap pc-to-phone, pc-phone, pc-to-fax, pc-fax, phone-to-pc, phone-pc, fax-to-pc, fax-pc calls over Internet/VoIP or ISDN/PSTN telephone networks. Use your computer as internet telephone, USB phone, USB handset, ISDN telephone, ISDN fax, answer phone, fax software,... Works with all Firewalls, NAT and LAN routers - nothing to configure.
http://www.pc-telephone.com/download/pc-telephone.exe - 1Mb - Download - Screenshot

Gizmo Project
Gizmo Project is a free Internet phone for your computer that lets users make crystal-clear free calls using the Internet. As easy to use as instant messaging, calls offer crystal-clear voice quality and PC-to-PC calls are always free. Calls to ordinary landlines and mobile phones are available... Gizmo Project users enjoy high-end features as customizable, free voicemail which is conveniently sent to you via email, free conference calling, free call forwarding, complete call history, free access to millions of people on SIP-based networks, built-in instant messaging (IM) capabilities,...
http://www.gizmoproject.com/GizmoDownload/WinGizmoInstall.exe - 10Mb - Download - Screenshot

vPhonesoft
vPhone is a feature-rich VoIP Internet-Phone software. vPhone customers can download for FREE and talk to each other by voice or video calls, including multi-participant conference calls, send SMS, MMS messages from vPhone to vPhone and from vPhone to any e-mail, completely free! ... Additional features of vPhone allow our customers calling regular and cellular phones worldwide at great rates, sending SMS messages to cellular phones, a built-in answering machine with Web access, and all these exciting features: Voice call PC to PC, Voice call - PC to regular phones, Voice conference - 1+4...
http://www.virtualiphone.com/vPhoneSetup.php - 3b - Download - Screenshot

VSoft3
The VSoft Phone is a simple to use internet telephone system that can reduce your call costs. It uses the latest technology to let you make calls to friends, family, and business associates anywhere in the world without any chunky telephone equipment. ... VSoft features includes unlimited free VoIP to VoIP call (PC to PC), free video call, low cost VoIP to home/mobile call, send SMS, confrence, SMS to call, VoIP bridge. ... It is free to download and easy to install. ... Put simply, it turns your PC into a telephone.
http://www.mobif.com.my/Download/VSoft3.3-setup.exe - 4Mb - Download - Screenshot

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... 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. ... You can call to any PC with a SIP net phone/ soft phone, not just the ones with One4000 installed.
http://www.one4000.com/download/one4000IP_setup.zip - 5Mb - Download - Screenshot

Free Internet Phone
Globe7 is a free downloadable software which enables you to make Free calls from pc to pc, pc to mobile and pc to landlines by watching Videos from Globe7 TV. Globe7 converts your PC and Laptops as a Second Phone. Globe7 offers you a free phone number to make free PC-to-PC calls and receive free... The peer to peer Video Call facility enables you to call your Globe7 friend with live video action in progress. ... s Free. ... More than that, you can call your Globe7 friend? ... Globe7 also offers outstanding features such as Video Calling, Follow Me Service, Voice Mail, Video Chat, Globe7...
http://www.globe7.com/downloadnow.php?refcode=AX11405XNew - 7Mb - 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

Call Any Phone any Where Free by Watching Videos
Net Phone has come up with new features. Call Any Phone any Where Free by Watching Videos. Net Phone is a Net based VoIP net phone, which integrates robust technologies such as Net stack by NIST (National Institute of Standards and Technology) and Java, JMF from Sun Microsystems. ... Net Phone offers you a free phone number to make free pc to pc calls and receive free incoming calls from any phone. ... Net Phone is a free downloadable net phone which enables you to make calls from pc to pc, pc to mobile and pc to landline.
http://www.6URL.com/0TSN - 7Mb - 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. ... The peer to peer Video Call facility enables you to call your FREE phone buddy with live video action in progress.
http://www.globe7.com/downloadnow.php?refcode=AX12640 - 16Mb - Download - Screenshot

Advanced Phone Recorder
APR is a call recorder software for desktop computers. If you have a voice modem installed to your pc, you can use it as a call recorder. Connect your telephone to your modem, make a phone call as usually and pressing the record button, whole conversation will be stored to your hard disk. ... Every recorded call is stored in a database with date, time, duration, and user memo. ... It is ideal for agencies, banks, financial institutions, credit card centers, insurance companies, call centers, sales departments, realty municipalities, etc.
http://concel.fileburst.com/aprFiles/apr.exe - 1Mb - Download - Screenshot