fuckjagex.com gives you free rsbots.net and autofighter.org and all those auths for free 5 days after u register. unluckly ive been banned for multi accounts.
^ That is illegal, and the auth code would be banned sooner or later.
If you want a free bot that you would be able to keep, try powerbot. Some of the scripts are very good.
Powerbot.org, is a great website for free scripts and it has a better client if you ask me atm, it actually does randoms. I wouldn't really invest in rsbots.net just yet because of the problems they've been having with updates.