Google Gadgets for Linux provides a platform for running Google Gadgets under Linux, catering to the unique needs of Linux users. It's compatible with the gadgets written for Google Desktop for Windows as well as the Universal Gadgets on iGoogle. There are two main components to the application: one is a common gadget library responsible for running and presenting a gadget, and the other is a host program that allows the user to choose gadgets and run them on the desktop. Currently it has hosts written for GTK+ and Qt, with the GTK+ host offering a sidebar similiar to that of Google Desktop for Windows.
Naked Objects is an application development platform. It's called Naked Objects because all you need to develop are your domain objects; the Naked Objects platform automatically creates an object-oriented user interface (giving you the choice of different styles) and the underlying storage mechanism (again, giving you the choice as how to persist your objects).
libTISCH is a framework for easy development of multi-touch applications. It contains tools for video processing, calibration, gesture recognition and, most importantly, a GUI toolkit with widgets that utilize the multi-touch gestures detected by the lower layers. It runs on Linux, Mac OS X, and Windows.
JGraph Layout Pro is a high performance graph layout library for JGraph that automatically positions your graph, diagram, or network in a visually pleasing manner. Layout Pro provides flexibility and a simple design, enabling you to use circular, tree, force-directed, and hierarchical layouts with ease. Example uses are organisational charts, workflow and process diagrams, call charts, network diagrams, UML tools, and more. It comes with its own documentation and an example applet.
TkDgen is a Tcl/Tk GUI front-end for DGen, an emulator of the Genesis video game console. It displays a list of available ROMs, and it can display a game screenshot when a ROM is selected in the list. It also helps you manage tips, graphic files, and hex codes for individual ROMs.