thats the reason why only few "good" bots exist ^^
free bots are agbot --> from rev6 (is very good but for beginners hard to configure)
then the ibot --> an other free bot which is very well (clientless, multi client etc.)
and then there are the bots which you need to buy like
sroking, mbot, phbot, sbot etc.
free bot i would use the ibot.
and if you wan t to buy a good bot then take sbot. its best bot ever! ^^
tutorials, more information etc. you can find in this section:
agbot:
ibot:
sbot:
the sbot tutorial is old but it already works ^^