Steam's crowd-sourced Greenlight approval process has now begun accepting applicationsfor non-gaming software, which the platform began featuring recently. The submission, voting and approval process for software is identical to that of the existing system for games, which is to say that approval comes by way of popular vote.
So! If you've been sitting on an alpha build of a program to track your cat's sleeping patterns, now might be a good time to dig it up and start debugging.