Everfest - A global calendar and search engine for festivals
Photofeeler - Choose your profile photos using hard data
Find your best festival - Compare the music you follow with 100s of festival lineups
Photo Aesthetics by Everypixel - AI to rate photographs according to their aesthetic value
Hootenanny - Find music festivals featuring artists you love.
DATEnhance - upload a couple of pictures, and go on to rate others.