Free Speculative Fiction Online 
Eric Flint: Rats, Bats & Vats
(Baen, 2000)
Eric Flint: Pyramid Scheme (Baen, 2001)
Mercedes Lackey & Eric Flint: The Shadow of the Lion (Baen, 2002)
Mercedes Lackey & Eric Flint: This Rough Magic (Baen, 2003)
(Ring of Fire Anthology, 2004). Also available on a freely distributable CD.
Eric Flint & Mercedes Lackey: The Wizard of Karres (Baen, 2004)
Eric Flint: The Rats, the Bats & the Ugly (Baen, 2004)
Eric Flint: Red Fiddler (Bedlam's Edge Anthology, 2005). Also available on a freely distributable CD.
(Baen, 2005)
(Jim Baen's Universe Vol. 1 No. 1, June 2006). Also available on a freely distributable CD.
Isfdb:
Eric Flint: Crawlspace (Jim Baen's Universe Vol. 1 No. 6, April 2007) Isfdb:
(Jim Baen's Universe Vol. 2 No. 1, June 2007) Isfdb:
Eric Flint: The Witch’s Murder (The Dragon Done It Anthology, 2008). Also available on a freely distributable CD.
(Fangs for the Mammaries Anthology, 2010)
Mercedes Lackey & Eric Flint: Much Fall of Blood (Baen, 2010)
.