windows phone sdk

Windows Phone Developer Tools consist of Visual Studio IDE.

Phone Spy Pro - For iPhone, iPad, Android, Windows Mobile, Symbian OS Phones

Phone Spy Software For BlackBerry, Android, iPhone, Windows Mobile, Symbian OS

The Windows SDK provides tools, compilers, headers, libraries, code samples

SIP Phone DLL - A powerful and highly versatile VoIP SDK for SIP applications

Hook API SDK for easy and quickly develop Windows API Hooking Applications.

VoIP SDK - A simple way to VoIP-enable your applications and websites

VoIP EVO SDK - A simple way to VoIP-enable your applications and websites

Spellchecker development library (SDK) for Windows (DLL, C++, .NET, Delphi)

FREE VoIP PBX: 3CX Phone system for Windows. No timeouts or limitations