How to list available app commands in terminal

I’m using fluxbox and recently i wanted to start an application for video editing and i couldn’t remember it’s name. I usually run apps from terminal so I was wondering is there a way to list all (applications or) app specific commands like Xmonad’s “run or raise” feature?
This feature can be seen here at 1:14 : http://www.youtube.com/watch?v=AyNkBLhIpQk&feature=related