Tan Software

501 Tangram Challenges by Gemini Puzzles

Are you ready to face 501 challenges of the classic Tangram puzzle? Solve hundreds of built-in challenges, construct your own Tangram shapes, and challenge your friends to recreate them! The object of the game is to form a shape from the pieces.

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Free DreamCalc by Andy Thomason

DreamCalc is the de-facto standard FREE photo realistic scientific calculator for Windows. It is the only choice which allows you to throw away your desk calculator. Fully featured and naturally convenient to use. Screenshot a Must See!

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Triangulator_for_PC by WildSoft

This little program makes it really easy to do trigonometric calculations. Just enter any combination of three parameters (sides, angles or height) and hit the calc button. All the remaining angles, sides and height are instantly calculated!

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