tagAR is an augmented reality tagging application developed for the Android operating system It allows you to tag locations in real time, and see tags posted by other users. It app encourages social networking between users from all walks of life, who can tag their favorite locations and post comments about the location. Anyone near that tag can see it on their mobile device.
Slidematch is a media rating, contextual retrieval, peer recommendation, and library management system for music, video, movie, and book impressions. It adds value to your existing media player by enabling you to easily record detailed impressions, retrieve content appropriate to what you are currently doing, and interact with friends.