There are enough scripts for skillshots, evade, lasthitting, kiting, and so on...
Currently I know about 3 projects; Bot of Legends, LeagueSharp and EloBuddy.
I'll warn you, you'll get permanently banned for using such tools.
Don't use them on your main account, you'll get banned within weeks/months and there are only some ways to get rid of the ban, and those aren't easy.