C programing suites/IDEs

codeblocks

sudo apt-get install codeblocks

Wikipedia: Code:Blocks

Geany

is a text editor using the GTK2 toolkit with basic features of an integrated development environment. It was developed to provide a small and fast IDE, which has only a few dependencies from other packages. It supports many filetypes and has some nice features.

Eclipse

Eclipse with Eclipse IDE for C/C++ Developers.

Some useful installation instructions here on Ubuntu Geek and here on Tech Guru Live