I've been involved with NYC BigApps since its creation three years ago. It's a great program. NYC opens up some of its data sources to developers who use the data to build new mobile and web apps. The judges vote on them (I'm one of the judges) and there are prizes awareded which total $50,000. A number of startups have come out of this program and I've met quite a few great developers through this effort.
The submissions for year three are in and they are solicting public opinion on them here. There are 96 apps this year to be considered so that's a lot of product to review. You don't have to review all of them (I do) so just go take a look and let the organizers know which ones you think are the best. There are nine days left in the voting phase. There are two popular choice awards that will be given based on the public voting.
All the winners will be announced at the annual BigApps event in late March.