It's a website with one purpose: it tells you what shows are happening tonight in Washington, DC. In a big, simple list that works really well on phones. It's also an open source project I just wrote about.
An open-ended research tool for everything that the DC Police Department writes on their twitter feed. The department made the controversial decision to encrypt all radio communications last year, with no allowance for journalists, and thus have devoted more time to twitter. The site allows you to view the last three thousand tweets and quickly analyze factors like age, city quadrant, gender, etc., though a clever regular-expression-based interface.