| 1. Xopus | http://www.xopus.com |
| 2. Q42 | http://www.q42.nl |
| 3. W3Future | http://www.w3future.com |
| 4. WWF | http://www.wwf.com |
| 5. Wikipedia on XML | http://en.wikipedia.org/wiki/XML |
| 6. Good Old Adventures | http://goodoldadventures.com |
| 7. W3C Technical Reports & Recommendations | http://www.w3.org/TR/ |
| 8. WHATWG | http://www.whatwg.org |
| 9. Firefox | http://getfirefox.com |
| 10. Architecture in Helsinki | http://www.architectureinhelsinki.com |