Kykachat is an Ajax Web based group chat system that is an excellent tool for team collaboration. It features real-time images, file sharing, and multiple rooms.
qwebirc is a fast, easy-to-use, Web-based IRC client. It supports SSL, tab completion, UTF-8, control codes (for colors, bold, and other text attributes), clickable channels and nicks, notifications, and many more features.
A Magento extension that implements reviews.
A utility to automate shipping of open-source project releases.