Box2D is an extremely popular physics engine that has been ported to many languages. DartBox2D is the Dart port.
Rikulo UI is a framework for creating incredible cross-platform Web and native mobile applications using Dart and HTML5.
Rikulo Gap is a bridge implementation of the Apache Cordova mobile framework (a.k.a. PhoneGap) in Dart. It enables developers to access native facilities of multiple mobile platforms using the HTML, CSS, and Dart languages.
Bootjack is a port of Twitter Bootstrap to the Dart world, built upon DQuery. Thanks to the nature of Bootstrap, Bootjack offers rich CSS assets and stylish components in a very non-invasive way.
Ripple is a lightweight messaging server for Dart language. It currently supports the STOMP messaging protocol.
A social networks visualizer for Linux.
A ping and traceroute daemon for IPv4 and IPv6.