overture and https://adwords.google.com/select/KeywordToolExternal find a niche, and then some kw for that niche in kw tool
i just found a completely free keyword tool / program here in the forums that i have tried and really like. it is called, massive keyword list builder. what i liked is it produces a big list of words but also shows google ppc search stats, costs, and roi for each word. It has a bunch of seo tools built in too which is kinda cool for me. best part for me is it is free since i don't spend much on programs these days (my company gets what i need). i use the ppc traffic estimates and search volume stats to judge keyword's initial rough potential. since this program does lots of words fast i scan the list looking for opportunities. i got the program at www(dot) ibizresearch(dot) com/mlb.html.
He didn't link the tool because as a new member you can't post external links. Heck, I'm not sure if I can either... Let me try: Nope.. not yet for me either. Sucks to be the newbie