All Hacks are viruses!
All hacks, especially, HaxBall hacks are made for one reason: To steal money from you.
It can look nice and friendly, but the true is: when you download a hack, you also download a viruse that you can't see. That virus steals your information and then, money.
I won't put any hacks in this page, because i'm good guy. But if you are stupid, you can try to google them.
Moreover,
Every cheaters are offten banned from the rooms. So, don't crash your reputation!