Teleglitch: Die more edition is free just below the bundle. Quite a fun game which I picked up in a bundle a few months ago.
And if you want to play Risk of Rain (which is an amazing game which I have put loads of time into and recently got a new update) then you can get the game and three copies for friends for only $6.45 (and that cost includes a bunch of other rad games too).
Please note if you get Risk of Rain though: "Sharable redemption codes will be available to share and redeem until November 28th at 11 a.m. Pacific time. After that date, sharing will be deactivated and all non-shared or non-redeemed codes will be deactivated."