Sitescore can give you a score for your website. Each website is rated by 5 prespectives
Marketing: SEO, Traffic
Design: CSS
Accessibility: For people who have disablities
Experience: User overall experience in the site
User: Users' votes
Sitescore also give you a analysis about what the site did good on and what have to improve.

Editor Comment:

This site got 6.2, mostly because of this site is not well known.

Unreal Soccer is a soccer game that looks like made in flash, but read the source you will know it is JavaScript with Canvas. It can be used as a widget for opera. It can work in Firefox and Opera. Henrik Falck and Anna Kanayama did a great job on that. a shot from the game:

Because it is a widget, it can be iframe into any site. Here is the link for pure widget.

Editor Comment:

Canvas are getting a lot attentions on my site. I find more and more Canvas game everyday, don't know if I can keep up because these games are addicting.

AutoSuggest is another free textbox suggestion system. It support special characters and XHTML compatible. Here is a demo:

Editor Comment:

AutoSuggest does not have some function the commerical CAPXOUS AutoComplete have. HTML formatting and JSON output are no where to be seen. But it is still better than a dull textbox. Give it a try.

6502asm is a 6502 compatible compiler and emulator in javascript made by by Stian S?reng, like jsMSX, the speed is slow. 6502asm can be a great platform to learn assembly code because it saves money from buying a 6502 machine.

Editor Comment:

Good piece of work, but seriously, this is not well known, you can see it by looking at how many posts on their forum.