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The Humble Weekly Bundle has a Gamepedia bundle live at their site.
Pay what you want ($1 minimum for Steam keys) for:
Windforge(Steam, DRM Free)
Stacking(Steam, DRM Free)
ReignMaker + Tower of Elements(Steam, DRM Free)
Paranautical Activity(Steam, DRM Free)
Strife Closed Beta Key
Pay $6 or more for:
Darkout(Steam, DRM Free)
Signs of Life(Steam, DRM Free)
Curse Premium (30-Day Access)
Pay $10 or more for:
Lifeless Planet(Steam, DRM Free)
Edge of Space(Steam)