Free Theory Software

Gravitational Lensing by Wouter Dhondt

Einstein's General Theory of Relativity demonstrates that a large mass can deform spacetime and bend the path of light. So, a very massive object, such as a cluster of galaxies can act as a gravitational lens. With this program, one can draw images to see the effect of gravitational lensing. You can easily test the effects of several parameters by changing them and redrawing the image.

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Caterpillar by GistaT Group

The program is based on the powerful model-free method of time series analysis "Caterpillar" (another name is SSA - Singular Spectrum Analysis). It combines advantages of other methods with simplicity of visual control aids. The result of the "Caterpillar" processing is a decomposition of the time series into several components, which can often be identified as trends, seasonalities and other oscillatory series, or noise components.

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Note ID by Kba Software

Teaches how to read music pitch notation on grand staff with key signatures. Program writes a note on grand staff and sounds its pitch. Student clicks the appropriate note on the screen keyboard. Scoring, automatic advance and modulation included. Student may also play keyboard and program displays note.

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ColorCache by Technology Lighthouse

ColorCache is a comprehensive color picker and palette building tool that allows you to create harmonious palettes and color swatches for all of your projects. You can add palettes to ColorCache as needed, select colors from anywhere on your monitor, or use the built-in tools to create pleasing color schemes. Palettes can be exported as Photoshop Color Swatch files (.ACO), Photoshop Color Table files (.ACT) or as XML files.

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