The Science Fiction and Fantasy writers of America once again came together and voted for the best novel, nevella, novelette and short story. This year the winner of the best novel is Ancillary Justice by Ann Leckie which already won the Arthur C. Clarke Award for best novel. Btw. next year Ann Leckie's novel is going to be published in German under the title "Die Maschinen" - the cover looks really good, especially in comparison to the original one.
This year seems to be the year of the women: The best novella is The Weight of the Sunrise by Vylar Kaftan which was published in the magazine "Asimov's Science Fiction" and can be read here. The Nebula Award for best short story goes to Rachel Swirsky's If You Were A Dinosaur, My Love (you can find it here) and the best novelette is The Waiting Stars by Aliette de Bodard. If you are interested, you can find it on the authors website.
btw. I totally forgot, Gravity won in the category for best movie!
Now let's wait until August to find out who the winners of the Hugo Award will be :)
Source (in German)
Source (in English)