ExportXL is an easy to use AutoCAD add-in for quantity takeoffs:

- Establish an open channel with Microsoft Excel and send area, length and volume data to different workbooks and worksheets.
- Control fonts, optional calculation of sums/averages and "where-to-send" options with one click.
- Work in large drawings easily by building an export list in stages.
- Join objects or make "convex hulls" in the process with one click.

OpenDiscreteDynamicProgrammingTemplate : founds optimal constrainted parameters of a discrete controls with second order optimization template replacing Hessian with directional derivatives and backpropagation for digital filter(as neural network)

Looking Glass is an interactive physics package that helps students visualize and understand the effects of optical components on light rays. While creating and exploring their own lenses and mirrors, students encounter the core concepts in optics.