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...There is a new version of API available under LGPL license at
https://github.com/gehtsoft-usa/BallisticCalculator1
There is a new version of application in progress (ported to net framework 5.0)
https://github.com/nikolaygekht/ballistic.calculator.app
Ballisitic Calculator based on JBM's implementation 3-degree of freedom model, ported to C#, improved to support metric system and extended by some math from Litz's "Applied Ballistic" book.
Calculator displays ballistic tables, graphs, comparison graph and reticle images.
The application is free to use under GNU license
A powerfull tool to work with math functions. At this stage of progress it's draw 2D graphs and 3D graphs of any function. Also have very easy to use calculator which can calculate complicate expressions.
QuillEdit is an enhanced notepad(maybe wordpad also) replacement. It includes all the features in notepad plus Math equation editor, Symbolic calculator, graph plotter, FireEdit syntax highlighter, spelling checker, word counter, and MDI interfaces.