Free fiction.
So far, the stuff at December Lights has the stuff at Figment beat, hands down, but I've only read a couple of each. It should be noted, of course, that the sites have completely different criteria for what they post: at DL, the stories have been donated by already-published authors (some of them quite well-known), and at Figment, anything goes, so really, it's apples and oranges.
Either way, FUN and YAY.
(First link via Tanita at FW. You should pop over and give her some love, by the way -- she's dealing with some AMAZING weather.)