Tan

Tangram 2.1
Tangram is a popular put-together puzzle. The object of the game is to form a given shape using all seven pieces (tans). Tangram is widely used when teaching spatial concepts in geometry. Tangram develops logical thinking and spatial imagination, and it is a great game for coffee breaks. Tangram by Gemini Puzzles has a large collection of 1000 best Tangram puzzles. The full version also has all puzzles and solutions in PDF format to print out.
tangram, tangrams, tangram, tans, tan, puzzle, puzzle, put-together, put together, silhouette,

Triangulator_for_PC 1.0
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. . Supports radians, decimal degrees, degrees & decimal minutes or degrees, minutes and seconds. Available for Microsoft Windows, Pocket PC or PalmOS)
triangulator, triangulation, sin, cos, tan, radian, angle, trigonometrics,

Harmonix 1.1
With the Harmonix PhotoShop plug-in you can create complex waveforms. The waveforms generated by Harmonix are created by mixing (or superimposing for the more technically-minded) harmonic frequencies. All features of the waveforms are automatically scaled to fit the image (or selection of course) so you will not have to reconfigure an entire wave should you decide to change the image size.
wave, harmonix, harmonic, harmonics, harmony, freq, frequency, waveform, form, sin,