pegboard is a social bookmarking service that lets you save, search, share and tag your bookmarks with people all over the world!
A huge list of lithium framework plugins from Michael Nitschinger.
Looks like he just turned it into Slim....
wheels, usability, API, python, assert, textpattern, plugin, applications, cakephp, community, keyboard, programming, zip, business, tutorial, javascript, saas, development, shopping, os x, design, testing, flash, beer, cakephp, javascript, development, cakePHP, theme, flac, american apparel, ide, flash, desktop application, info-viz, twitter, wordpress, work, font, documentation, open source, advanced, web application, homebrew, billboards, cell phone, japan, django, text editor, facebook pages