gPodder is a Podcast receiver/catcher written in Python and pyGTK. It manages podcast feeds for you, and automatically downloads all podcasts from as many feeds as you like. If you are interested in Podcast feeds, simply put the feed URLs into gPodder and it will download all episodes for you automatically. If there is a new episode, it will get it for you. It supports download resume, if the server supports it.
Copper is a Web-based project management software tool designed to help creative teams manage clients, projects, tasks, files, budgets, and events. It has an HTML/AJAX front end. It is available with full source for a licence fee or as a SAAS hosted service (compatible with iPhone, but available via PC/Mac/Linux and a Web browser).
Luxor is an open-source XML User Interface Language (XUL) toolkit in Java that lets you build UIs using XML and also includes an ultra light-weight, multi-threaded Web server, a portal engine, and a template engine. It is also Web Start-ready, as everything fits in a jar and requires no loose files.
The x-Desktop is designed to unify different operating system desktop interfaces into a browser-only application interface. It helps users to feel comfortable with any application using the interface they are used to. It helps companies to unify their intranet applications into one desktop interface--built on existing interfaces or one which incorporates their own CI. It helps you design the same interface for all types of devices using browsers like PDA and other mobile devices, Notebooks, Desktops, Tablett Computers and any other future devices which may come up.