MS Paint IDE - The most partially downloaded IDE on the internet
Netbeans - NetBeans IDE 7.0. Develop desktop, mobile and web applications with Java, PHP, C/C++ and more. Runs on Windows, Linux, Mac OS X and Solaris. NetBeans IDE is open-source and free.
Etherpad - Etherpad is a highly customizable Open Source online editor providing collaborative editing in...
IntelliJ IDEA - Capable and Ergonomic IDE for JVM
Zoho Writer - Create. Review. Distribute
C++ Builder - Modern, fast C++. Four platforms, backed by powerful UI and database frameworks.