PCBest SIP SDK is one of most widely used tools to develop SIP applications. It is simple, well designed and orginized, fexible and reliable. It will save you tons of time to develop a mature voip application. 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.

• License: Demo
• Language: English
• Release: 2007-09-11
• Size: 2 Mb
• Cost: 1000.00 $

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.

• License: Shareware
• Language: English
• Release: 2005-09-18
• Size: 1 Mb
• Cost: 1500.00 $

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 successfully ported to Windows CE/Pocket PC/Smart Phone.

• License: Demo
• Language: English
• Release: 2005-09-01
• Size: 2 Mb
• Cost: 799.00 $

Hook API SDK is a Software Development Kit for easy and quickly develop Windows system wide API Hooking Applications. It helps you hooking Windows system functions or functions in 3rd applications, this means you can call your own functions instead of some Windows system APIs or functions of other appliction.

• License: Shareware
• Language: English
• Release: 2006-05-10
• Size: 259 Kb
• Cost: 100.00 $

SIP Phone DLL - 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.

• License: Commercial
• Language: English, German
• Release: 2008-02-28
• Size: 9 Mb
• Cost: 999.00 $

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.

• License: Commercial
• Language: English, German
• Release: 2007-09-22
• Size: 3 Mb
• Cost: 999.00 $

VoIP SIP SDK with DLL, ActiveX and .NET - 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.

• License: Commercial
• Language: English, German
• Release: 2008-02-21
• Size: 9 Mb
• Cost: 999.00 $

Hook API SDK is a Software Development Kit for easy and quickly develop Windows system wide hooking program. It helps you hooking Windows system functions or functions in 3rd applications, this means you can call your own functions instead of some Windows system APIs or functions of other appliction.

• License: Shareware
• Language: English
• Release: 2006-05-05
• Size: 258 Kb
• Cost: 180.00 $

Uplink connects SIP protocol VoIP calls to the proprietary Skype phone network. It works in both directions.

• License: Shareware
• Language: English
• Release: 2006-01-01
• Size: 238 Kb
• Cost: 27.50 $

Best Phone is a free downloadable soft phone which enables you to make calls from pc to pc, pc to mobile and pc to landline. Best Phonoffers you a free phone number to make free pc to pc calls and receive free incoming calls from any phone. Best virtually converts your pc into a second phone. Best Ph also offers outstanding features such as Video Call, Follow Me Service, Voice Mail, Video Chat, MP3 Player, Video Streaming, Fax and Online Search.

• License: Freeware
• Language: English
• Release: 2006-04-20
• Size: 20 Mb
• Cost: Free

API Monitor is a software that allows you to spy and display Win32 API calls made by applications. It can trace any exported APIs and display wide range of information, including function name, call sequence, input and output parameters, function return value and more. A useful developer tool for seeing how win32 applications work and learn their tricks.

• License: Shareware
• Language: English
• Release: 2006-03-31
• Size: 3 Mb
• Cost: 99.00 $

Download Globe7 and call any Phone anywhere in the World for Free. Globe7 also offers Free High quality PC to PC Video calls with your Globe7 friends. Just Watch videos in Globe7 TV and earn Free Extra minutes to make Free International calls. Globe7 TV Provides exclusive International News, Latest movie trailers, Entertainment Video clips for all countries and many more to come.

• License: Freeware
• Language: English
• Release: 2006-07-30
• Size: 7 Mb
• Cost: Free

VOIP H323 DLL Soft Phone SDK brings H.323 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 or use the Gateway or the Gatekeeper to connect to /or from PSTN lines. Now VOIP open source projects have made it easier to implement a customized VOIP Solution eliminating costly PSTN lines.

• License: Shareware
• Language: English
• Release: 2005-09-24
• Size: 5 Mb
• Cost: 399.00 $

Text Capture SDK is a pure Delphi package of a Text Hooking DLL and a Word Capture Sample Program, Text Hooking DLL captures the text contents of any Windows and Controls by Hooking the TextOut /ExtTextOut /DrawText APIs, WordCapture program captures the text around the current mouse cursor by invoke the Text Hooking DLL, This package was entire written in Delphi.

• License: Shareware
• Language: English
• Release: 2006-05-29
• Size: 420 Kb
• Cost: 45.00 $

VoIP H.323 SDK - A powerful and highly versatile VoIP SDK to accelerate development of H.323 applications and websites Our brand-new VoIP H.323 SDK provides a powerful and highly versatile solution to add quickly H.323 based dial and receive phone calls features in your software applications. It accelerates the development of H.323 compliant soft phone with a fully-customizable user interface and brand name.

• License: Commercial
• Language: English, German
• Release: 2008-04-03
• Size: 7 Mb
• Cost: 1499.00 $

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).

• License: Shareware
• Language: English
• Release: 2007-08-06
• Size: 1 Mb
• Cost: 19.99 $

SpyStudio is a powerful API Spy application that enables you to monitor and break code execution in real time, intercept api's function calls and modify function's parameters before and after its execution. SpyStudio supports any type of parameter even structures of any type.

• License: Freeware
• Language: English
• Release: 2007-09-21
• Size: 4 Mb
• Cost: Free

Adore Video Softphone makes your voice and video chat easy and approachable. Adore Video Softphone is the new choice for an eye-opening real and revolutionized lifestyle. Today's tough and hectic life demands better service and peace of mind all in budget. The Adore Video Softphone with slashed International calls and video facility make your every call a unique experience. It requires an external hardware called web cam and an Adore Softphone

• License: Freeware
• Language: English
• Release: 2007-12-07
• Size: 2 Mb
• Cost: Free

If you as a software developer intend to offer your clients a tailor-made Fax Software, by which the end user can print his digital documents - for example think of an MS Word *.doc - without fax device, virtually directly into the telephone line, then Doc2Fax API is the solution for you.

• License: Demo
• Language: English, German
• Release: 2008-01-16
• Size: 292 Kb
• Cost: 430.00 $

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 calling experience with features like: * SIP + IAX protocols * SIP over TCP/TLS/UDP(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

• License: Freeware
• Language: English
• Release: 2007-07-19
• Size: 2 Mb
• Cost: Free