...but no Bujold novels are available for free (only a short story).
I second Honor Harrington recommendation. At All Costs CD handily includes all books in the series so far. Be prepared for some late night reading

Another great authors available from Baen Free Library/CDs are John Ringo (don't start with Ghost series though), Eric Flint (check 1632), David Drake. For a bit older but still great SF try Keith Laumer (Odyssey, The Lighter Side) or Andre Norton. For fantasy, check Elizabeth Moon.