Film festival listing sites

Britfilms directory
comprehensive list of international festivals

Without A Box
one-stop shop for entering dozens of international festivals, charges a $79 annual fee (approx £50) but offers discounts on festival fees, some extended deadlines and various other services

www.filmfestivals.net
link to festivals with imminent deadlines

imdb festival list
international festivals, mainly USA

Screen Daily
comprehensive list of international festivals

FaTCaT directory
short list of UK festivals plus other useful info