Passport to Web 2.0

http://ccmixter.org/
ccMixter is a community music site featuring remixes licensed under Creative Commons where you can listen to, sample, mash-up, or interact with music in whatever way you want.
Remixers If you’re into sampling, remixing and mash-ups grab the sample packs and a cappellas for download and you can upload your version back [...]

http://scratch.mit.edu/
Scratch is a new programming language that makes it easy to create your own interactive stories, animations, games, music, and art — and share your creations on the web.
Scratch is designed to help young people (ages 8 and up) develop 21st century learning skills. As they create and share Scratch projects, young people learn important [...]

http://www.wordle.net/
Wordle is a toy for generating “word clouds” from text that you provide. The clouds give greater prominence to words that appear more frequently in the source text. You can tweak your clouds with different fonts, layouts, and color schemes. The images you create with Wordle are yours to use however you like. You can [...]

http://goanimate.com/ 
About the site -
We are a bunch of guys who love animation and want to share our passion with the world! The problem is that animation requires very specific skills. Animators need to learn Flash or other advanced software before being able to create anything. They also need to know how to draw. That’s why [...]

PHUN
Phun is a Master of Science Thesis by Computing Science student Emil Ernerfeldt for supervisor Kenneth Bodin at VRLab, Umeå University, Sweden. The solver is based on work by Claude Lacoursière
Phun is meant to be a playground where people can be creative. It can also be used as an educational tool to learn about physics [...]

http://keybr.com 
Features

No registration or sign up is required.
See typing charts: typing speed, number of errors, top speed, average speed, etc.
Supported keyboard layouts: US, US (Dvorak), and UK.
Supported languages: English, German, French, Spanish, and Russian.