The Banner Saga, PC/Mac – £3.08
To purchase digital games from Amazon US, use your UK Amazon account, and add a US billing address to your account. This address needs to be a valid US address, but nothing will be sent there, and you can access all your games through their website. Some card issuers may charge a fee.
Registers on Steam.5
Knytt Underground, PC/Mac/Linux – Pay What You Want
Registers on Steam.0
Bridge Constructor Playground, Cubemen, Cubemen 2 & Thomas Was Alone, PC/Mac/Android – Pay What You Want
Registers on Steam.
Disclosure: I have done some business consultancy for Mike Bithell, developer of Thomas Was Alone.0
Crystal Catacombs, PC/Mac/Linux – Pay What You Want
Cheers Gnome for the tip off.0