Author of the Kitty Norville series, Carrie Vaughn has a short story “Peace In Our Time” available at Feedbooks.
Mary Robinette Kowal, award-winning SF/F author, has a bunch of stories available on-line or via download.
If you like your fantasy to swap spit with the horror genre, then check out Douglas Clegg. The author of Priest of Blood, gives you a new short story every month.
Award-winning fantasy author Robert McCammon has free stories available for reading.
Rare and acclaimed Doctor Who books are now available for free in e-book format.