Pencil Project - Diagrams in Firefox

" 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...

"



http://www.evolus.vn/Pencil/