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Eureqa (pronounced "eureka") is a software tool for detecting equations and hidden mathematical relationships in your data. Its primary goal is to identify the simplest mathematical formulas which could describe the underlying mechanisms that produced the data. Eureqa is free to download and use. Below you will find the program download, video tutorial, user forum, and other and reference materials.

The Hot Potatoes suite includes six applications, enabling you to create interactive multiple-choice, short-answer, jumbled-sentence, crossword, matching/ordering and gap-fill exercises for the World Wide Web. Hot Potatoes is not freeware, but it is free of charge for those working for publicly-funded non-profit-making educational institutions, who make their pages available on the web. Other users must pay for a licence. Check out the Hot Potatoes licensing terms and pricing on the Half-Baked Software Website.

Gribouill-i is a portable graphic editor to draw on the screen L'œil et la vision., Cœur2., Planètes 3D... are interactive documents.

ZoomIt is screen zoom and annotation tool for technical presentations that include application demonstrations. ZoomIt runs unobtrusively in the tray and activates with customizable hotkeys to zoom in on an area of the screen, move around while zoomed, and draw on the zoomed image. I wrote ZoomIt to fit my specific needs and use it in all my presentations. ZoomIt works on all versions of Windows and you can use pen input for ZoomIt drawing on tablet PCs.

Greenshot is a revolutionary screenshot tool optimized for productivity. * Save a screenshot or a part of the screen to a file within a second. * Apply text and shapes to the screenshot. * Offers capture of window, region or full screenshot. * Supports several image formats.