a.placebetween.us - Find a meeting point based on place type
Everfest - A global calendar and search engine for festivals
Zenly - Zenly is a GPS tracker to locate your friends in realtime.
Find your best festival - Compare the music you follow with 100s of festival lineups
Works For All - Find a central meeting place for everyone in the group
Hootenanny - Find music festivals featuring artists you love.