...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