Need a free macro app please recommendation please

Hey guys

I was planning to get the G15 keyboard JUST for the macro feature, but that's on hold atm since I'm saving my $ for a new video card upgrade, so anyway does anyone here know a free and easy to set up macro I could use? I need a macro that help me execute repeating key stroke/clicks so I don't have to repeating clicking to slash and hack in this single player RPG : D

thanks in advance