A Javascript bookmarklet called Visual Event which visually shows the elements on a page that have events subscribed to them, what those events are and the function that the event would run when triggered. This is primarily intended to assist debugging, but it can also be very interesting and informative to see the subscribed events on other pages.

Looks like a stripped-down alternative to Backbone.

Compelling, but not sure the license is a good fit.

"purple-include is a client-side JavaScript library that allows you to do client-side transclusions."

Really nice home page, recent activity driven in part by JSON flavored feedburner feeds.

GPL'd OHS-style navigation of your OPML document in Javascript via EE Kim and Doug Englebart and BradNeuberg = ultra awesome.

"The server-side blink tag works by using a timed AJAX request, to let a Web 2.1 compatible server update the client document so that the blinking text is turned invisible."

Yeah, I'm in Javascript kindergarten here.

...on monthly update cycle.

"To you who feel like failures because you spent last year honing your web skills and serving clients, or running a business, or perhaps publishing content, you are special and lovely, so hold that pretty head high, and never let them see the tears."

Interesting set of webby experiments, typically involving javascript, XSLT, and/or Firefox extensions.

Cute javascript fades, swoops, and etc.

Description of Myspace worm.