Credible

 Credible is built around the concept of easy-access tutorial videos with emphasis on brevity. The shortest and most accurate videos for a category are voted the most 'credible', and uploaders can attempt to explain how to do something- anything- as clearly and quickly as possible.
The demo is meant to demonstrate basic site functionality, the upload process, and searching for and rating a video.
 

 Lightbulb is built around the concept of 'local ideas', a basic event board categorized by event type. Built for both locals and tourists, it's meant to give basic directions, event descriptions, and times.
The demo is meant to demonstrate the basic search and scheduling for a local event.