The Pencil Project's unique mission is to build a free and opensource tool for making diagrams and GUI prototyping that everyone can use.
Top features:
Built-in stencils for diagraming and prototyping
Multi-page document with background page
On-screen text editing with rich-text supports
PNG rasterizing
Undo/redo supports
Installing user-defined stencils
Standard drawing operations: aligning, z-ordering, scaling, rotating...
Cross-platforms
Adding external objects
And much more...
Pencil will always be free as it is released under the GPL version 2 and is available for virtually all platforms that Firefox 3 can run. The first version of Pencil is tested against GNU/Linux 2.6 with GTK+, Windows XP and Windows Vista.
