Have you ever received one of those questionnaire emails? You know the ones I mean, 20 questions (or more), desperately seeking to find out inane details about your life and hopefully bring some email servers to a halt? I'm sure you've had one of those in your inbox at some point. That time is over. Now you can do it on Formspring.
n0tice is a simple location based public notice board system. It's completely open and unfiltered, and allows users to post any sort of notice they want, tagged with their location, and lets them read notices near them, sorted by distance. Quite a simple little idea, and if it gets a user base, it could end up being quite useful. Although first designed for iPhone, the n0tice API was quickly released to allow integration into other programs, including desktop apps.