Free Pen Melee thingie for Payday2.
http://www.overkillsoftware.com/kentokeys/
Heads up, they keep adding keys, but it's getting the Reddit hug of death at the min'.
Needs you to log in on your steam account (on steam though, not on OKS site).
If it times out, refresh. I did & it showed me a key on the site.