I found this nice Open Source application that is nice and simple to use with a reasonable set of features in the stand alone version that I am using
The Pencil Project’s unique mission is to build a free and open source 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
Inter-page linkings!
On-screen text editing with rich-text supports
Exporting to HTML, PNG, Openoffice.org document, Word document and PDF.
Undo/redo supports
Installing user-defined stencils and templates
Standard drawing operations: aligning, z-ordering, scaling, rotating…
Cross-platforms
Adding external objects
Personal Collection
Clipart Browser
Object snapping
Sketchy Stencil
And much more…
Licensing and Versions:
Pencil will always be free as it is released under the GPL version 2 and is available for virtually all platforms that Firefox 4+ can run. The first version of Pencil is tested against GNU/Linux 2.6 (Fedora, Ubuntu and Arch) with GTK+, Windows XP and Windows Vista/7.







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