X-link to the DRM-free thread for a new bundle:
The Starward Bound Bundle from StoryBundle, curated by Martin Kee, consists of space opera by a mix of indie and traditionally published authors. At the $15 top tier, there's a backlist novel by Mike Resnick and a Locus Award-winning backlist short story collection by David Brin, and a recent frontlist novel by German author Marko Kloos, which is ordinarily sold by Amazon's 47North imprint.
Also, some sfnal RPG offerings for the tabletop gamers.