Bundle Stars' Reboot 2.0 Bundle is a grab bag of the great, the good, the bad and the ugly.
Weird Worlds: Return To Infinite Space is worth the asking price by itself. The sequel to the legendary inspiration behind FTL lets you have randomly-generated space adventures in your lunch hour, with each session short, unique and awesome. See: here's a thing wot I wrote.
Otherwise, you'll also receive the shiny PC version of Galaxy On Fire II, Afterfall: Insanity, Disciples III, Sniper Ghost Warrior and Tower Wars. Reviews through the links. Credit to ste1975 @ HUKD, who found this before I did!