Godbound is a d20 game I found being developed, currently on Kickstarter, here.
Its mechanics are loosely based on D&D 1e, but but with very significant differences. The premise of it is that your character is bound to divine Words, fragments of power from the destroyed Made Gods. It's set in a very postapocalyptic world, shattered by the divine war that followed the creation of these artificial deities after the Throne of God was found to be empty. Now the world is split into multiple realms, floating in endless darkness, and the Godbound are the only things that can save it from final dissolution. I enjoyed reading about it, and wouldn't mind playing it; it seems to be a more rules-light version of the same concept behind Mythic Pathfinder or Exalted.Here
is a playable set of beta rules, and here
is a much more comprehensive review and example of actual play.