Try Ruby
There’s little doubt that Why is a strange person, and his poignant guide to Ruby will seem weird to most people — but this online interactive browser-based Ruby tutorial is very cool. (He also maintains a very interesting blog, BTW.)
This is a single archived entry from Stefan Tilkov’s blog. For more up-to-date content, check out my author page at INNOQ, which has more information about me and also contains a list of published talks, podcasts, and articles. Or you can check out the full archive.