"ParseKit is a Mac OS X Framework written by Todd Ditchendorf in Objective-C 2.0 and released under the MIT Open Source License. ParseKit is suitable for use on Mac OS X Leopard, Snow Leopard or iPhone OS. ParseKit is an Objective-C implementation of the tools described in "Building Parsers with Java" by Steven John Metsker. ParseKit includes additional features beyond the designs from the book and also some changes to match common Cocoa/Objective-C conventions. These changes are relatively superficial, however, and Metsker's book is the best documentation available for ParseKit."

"Compass is an open-source CSS authoring framework which uses the Sass stylesheet language to make writing stylesheets powerful and easy. If you're not familiar with Sass, you can take a look at these simple tutorials to get caught up."

"Blueprint is a CSS framework, which aims to cut down on your development time. It gives you a solid foundation to build your project on top of, with an easy-to-use grid, sensible typography, useful plugins, and even a stylesheet for printing."

"Quickly build web application mockups using technology you use every day."

"Node.js is evented I/O for JavaScript, built on top of the blazingly fast V8 engine. It makes handling event-driven I/O incredibly simple, and aligns perfectly with our maniacal focus on simplicity and developer productivity. The Ruby community has quickly adopted node, and with great reason. Complimenting existing apps with node.js for components that require real-time event handling or massive concurrency is both easy and elegant – in part thanks to the availability of frameworks such as express."

"RR (Double Ruby) is a test double framework that features a rich selection of double techniques and a terse syntax."

"OneSwarm is a new P2P data sharing application we’re building to provide users with explicit control over their privacy by enabling fine-grained control over how data is shared. Instead of sharing data indiscriminately, data shared with OneSwarm can be made public, it can be shared with friends, shared with some friends but not others, and so forth. We call this friend-to-friend (F2F) data sharing. OneSwarm is:..."