This is a Open Source Geographic Information System extreamly open for further developpement due to a plug-ins mecanisme. It uses OpenGL for optimizing graphics and can connect to a native server or handle other map software formats
Ytk is a Tcl/Tk program which adds menus, buttons and features to the basic command line driven Yorick program and language. It also enables usage of all Tcl/Tk widgets and functions including buttons, sliders, checkboxes, and other typical TK widgets to