VIM is a popular Linux Text editor. Not a text editor as in Windows notepad, but can be used as a fully fledged IDE. Numerous plugins are available which extends the functionality of VIM to the extent that FTP client, mail readers and even a Tetris game is available in the form of a VIM plugin.
VIM uses combination of commands to navigate around the editor and performing text editing and programming/system/IDE functions, targeting to be mouse-free and lessen the burden in doing repetitive text editing functions.
VIM Adventures is a nifty little fantasy adventure game giving you a head-start in the VIM learning curve.Click the link below to start the fun.