1. 95 Old School Games You Can Play Online: An amazing collection – Contra, Asteroids, Battle city, Legend of Zelda …. ahh! feeling nostalgic.
2. Get-Tuned teaches you how to tune your musical instruments. They also have several online instrument tuners for the various types of instruments like guitars, violin, mandolin, banjo etc.
3. Tone Matrix: It’s an online audio tool. Set a tempo and click on the grid to highlight boxes and listen how it translates into an awesome music. Very addictive.