South by Southwest (SXSW) has been a springboard for musicians, film makers, and mobile developers for years, and 2012 was no exception. The Austin-hosted event this week was abuzz with mobile apps – some new and some that have been around for years – that helped attendees do everything from exchange business cards to being crowned "Mayor."

Here are 10 mobile apps that were a must-have for SXSW-ers this week.