Humble Bundle offers Steam downloads of the Humble Double Fine 7-Game Bundle for Windows for whatever you want to pay. If you opt to pay the bare minimum of $1, you'll get Mountain, 140, and Thoth. That's $11 under what you'd pay direct from Steam. If you pay the current average of $7.19 or more, you'll also get GNOG and Escape Goat 2. Finally, pay $10 or more to get Gang Beasts and Everything. Deal ends January 29.
These freebies are available to anyone with an internet connection — including those without an Amazon Prime membership.