Facebook's JavaScript client-side implementation of Connect.

A Native Mac OS X Browser Platform based on WebKit with a Cocoa plug-in architecture, tabs, userscripting, userstyles, URL shortcuts, Twitter integration, more.

A Redis client implementation for JavaScript (Node, Google V8)

Experimental fork of Pieter's nice git GUI for OS X. Includes: sidebar, fetch, pull, push, add remote, merge, cherry-pick, rebase, clone, clone to. Mac OS X 10.5+ (see wiki for screenshot)

Quicksilver Interface - Updated for Snow Leopard

Create playlists and share them with your friends.

CSS3 version of Aristo

A Toolkit for creating Desktop Hardware Accelerated Graphics with JS.

The official Last.fm desktop application suite

Playdar Windows wrapper

Specifications for publishing and consuming Activity Streams