All the Short-film Festivals...

Check out the following for a list of short-film festivals around the world:

• http://en.wikipedia.org/wiki/List_of_film_festivals
• http://www.oscars.org/awards/academyawards/rules/shortsfestivals.html
• http://www.festivalfocus.org
• http://www.imdb.com/festivals/
• http://worldfilm.about.com/od/filmfestivals/Film_Festivals.htm
  

Here is a list of no entry fee film festivals: http://www.filmmaker.com/node/19244

http://jasonbkohl.com/archives/2011/short-film-festival-strategy/ lists a few festivals most of which you can find in the bullet list.