RAR Password Cracker 4.2x is FREEWARE. Almost freeware. Yes, it DOES contain some advertisement. This is a cost of being free. Nevertheless offers are totally opt-out and not intrusive; Please LET'S KNOW if it is not!
Version 4.20 (installation exe, 381 Kb):
However for as little as €10 you can purchase a download free of ANY advertisement!