'Terrance the Flying Eyeball' is now available to download for Windows, Mac and Linux.
A group for all fans of science fiction.
Free science fiction e-books:
Feedbooks.com (to download an e-book in a different file format than .epub, you need to click the title first, then choose the format)
Baen.com (a couple of free sci-fi books, there are also some fantasy ones there)