The open source, cross platform Free C++ IDE.
Code::Blocks is a free C++ IDE built to meet the most demanding needs of its users. It is designed to be very extensible and fully configurable.Built around a plugin framework, Code::Blocks can be extended with plugins. It even includes a plugin wizard so you can create your own plugins! (Free SDK downloaded separately) 

Referrences

• Site
  • http://www.codeblocks.org
• Forum
  • http://forums.codeblocks.org
• Source
  • http://www.codeblocks.org/source_code.shtml

Download

• Ms-Windows
  • codeblocks-8.02mingw-setup.exe
• Slackware Linux
  • codeblocks-8.02-i686-2FZ.tgz
• Debian, Ubuntu, Fedora, Suse...
  • codeblocks-8.02

Note

• We recommend using CodeBLocks version 8.02;