Fate: The Traitor Soul

The whole Fate series is sort of a poor man's Torchlight. But it still is something to play while waiting for Torchlight II to come out. Fate: The Traitor Soul -- the second standalone expansion -- is again basically the original game (or the previous installation more precisely) but with more things.

Fate: Undiscovered Realms

Fate: Undiscovered Realms, a standalone expansion to Fate, followed the original game three years later. It continues with the same concept but has some lazy and outright weird design choices.

Fate

Fate (or FATE) is the game Travis Baldree made before Torchlight (I think he worked on Mythos between them), and if you've played the latter, you will find Fate very similar. In fact, they are almost the same game, Torchlight is just an improved version.