(Disclosure: This site contains product affiliate links. We may receive a commission if you make a purchase after clicking on one of these links. Read our affiliate disclosure for more info.)
IndieGameStand has a pay what you want deal up Skyward Collapse: Complete Edition.
Minimum price is $0.25. Pay $1 or more to get a Steam key. Beat the average price and you get the bonus game Bionic Dues (Steam, DRM Free)