Small utility for Mac OSX that makes screenshots of webpages.
http://www.derailer.org/paparazzi

Lightbox, Hoverbox, and Suckerfish, all-in-1…
http://www.mondaybynoon.com/2006/03/27/suckerfish-hoverlightbox

The Google Toolbar API lets webmasters create custom buttons for the Google Toolbar (version 4 and above) using XML. Buttons can navigate to and search a site, display an RSS feed in a menu, and change their icon dynamically. Users can add your custom buttons to their Toolbar by clicking on a link on your website or Google’s Button Gallery.
http://www.google.com/tools/toolbar/buttons/apis/index.html

Lightbox JS is a simple, unobtrusive script used to overlay images on the current page. It’s a snap to setup and works on all modern browsers. Places images above your current page, not within. This frees you from the constraints of the layout, particularly column widths.
http://www.huddletogether.com/projects/lightbox

Poperti (previously GookBox), the first musicail application. Plays and stores music in your Google Gmail account. You now, dont need to duplicate or recreate your music collection when you relocate or travel. Maintains your music collection in your gmail account, streams your music directly from your mailbox even caching it for times you become offline.
http://www.gookbox.com

Learning to program computer should be fun, for adults and children alike. RUR-PLE is an environment designed to help you learn computer programming using the language Python.
http://rur-ple.sourceforge.net

Tool for automatically mirroring links from the popular social-bookmarking service del.icio.us to your personal website. Posting, tagging, and management still occur within the del.icio.us interface, but design and layout can now be fully customized on your mirrored site.
http://slashlinks.eyebeamresearch.org

A fast, easy way to create personal search engines using only the sources you want, it creates custom search engines for the Firefox search box, using Yahoo! Search.
http://rollyo.com

For All Your Browser Quirks. Contains more than 150 pages with CSS and JavaScript tips and tricks, and is a source for studying and defeating browser incompatibilities.
http://www.quirksmode.org

“Less noise, more signal.” Jeffrey Zeldman lashes out at the web 2.0 buzzword and surrounding hype, laying down the law of rich internet apps and new skool startups.
http://www.alistapart.com/articles/web3point0

“You should probably buy a shredder today.”
Similar to the “credit card prank“, but much scarier…
http://www.cockeyed.com/citizen/creditcard/application.shtml

Based on Ludwig Gatzke’s compilation of Web 2.0 logos, The Fontshop offers a breakdown of the fonts used in some of their favorite brands.
http://www.fontshop.com/fontfeed/archives/web-20-logos.cfm

Ludwig Gatzke’s image of (his views of) Web 2.0 logos, with a link to each company in the picture.
Part 2 here
Clickable image (Flickr style) here
http://www.diggwatchblog.com/web-20-logos-and-links

“This is where I try to sum up the current state-of-the-art in graphic design for web pages, and identify the distinctive features that make a web page look fresh, appealing and easy to use. I’ll update this article over time as new features stick out.”
http://www.webdesignfromscratch.com/current-style.cfm

“Keeping up with the latest Digg Trends and News. It’s Digg served up for easy consumption.”
http://www.diggwatchblog.com