I'm pleased to have discovered two new-to-me DRM-free ebook vendors, but it's kind of a bummer that, out of 14 titles, only 3 are available like this. It would be nice if I just missed something - let me know if you find one.
God's War, by Kameron Hurley: $6 at Baen Ebooks
Mechanique, by Genevieve Valentine: Lizbatty says she found this at Wizard's Tower.
The Freedom Maze, by Delia Sherman: $9.95 at Weightless Books