Also try Geany, it is a simplified IDE that's low on resource use.
I think the command to get it is:-
It runs from the LXDE desktop and you will see it in the menu under Programming. Piece of cake to use.. Just remember when typing that first "hello world" program to use the "Build" menu option. If you do "Compile" it won't link, so no executable will be produced.
Having said that, I think I will also give CodeBlocks a try...