Shadow Warrior (the modern remake) is free to own on Steam for a limited time (Available until August 23rd 10AM Pacific), go to the Steam page and click on Install Game - you don't have to install it, it will automatically be added to your Steam library.
Brink, the Bethesda's post-apocalyptic FPS, is now free to play on Steam forever, go to the Steam page and click on Play Game - it will be added to your Steam library.
Game Development Bundles
HTC VIVE - The best Virtual Reality system is now only $599
G2A Deal Edition Bundle 5
Humble Spooky Horror Bundle
Humble 2K Playstation Bundle
Humble Book Bundle: LEGO MINDSTORMS & Robotics presented by Apress
Humble Book Bundle: Brainiac 2 presented by No Starch!
Humble Comics Bundle: Transformers vs. G.I. Joe presented by IDW
Humble Monthly Bundle
Humble Store Sale
Green Man Gaming Loot Boxes Bundles