omtk

If you're looking for a platform-independent GUI toolkit, then omtk might be just what you need. Available as an open source offering and standing for "openmedit toolkit," this toolkit has been optimized for multi-document applications across various platforms. It currently runs natively on GTK2 and Mac OS X.

To get started with omtk, you'll need to first install it. This can be done by typing 'make gtk' to compile the GTK2 port or 'make mac' to compile the MacOS X port. It's recommended that you install omtk using 'make install.' Should you need to uninstall it, the command 'make uninstall' can be used.

All the example codes have been provided within the examples directory of omtk. Provided that you want to compile an example, head to the directory (e.g. `cd examples/input`) and type 'make' to compile. You will also need to know how to run an example on your platform. To do so using X11 (GTK2), type: ./name (replace name with the name of the example). If running the example on Mac OS X, you can type: open name.app (replace name with the name of the example).

There are a few notable features in this release including callbacks for cut/copy/paste/delete/selectall, menu separators, added input widgets, fixed bugs, and more functions. Additionally, you can now set the tab order of the widgets and set the default widget of a document. Overall, the omtk is a versatile and user-friendly software that is worth a look.