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GEOPosCalc
GEOPosCalc is an easy to use and powerfull tool for coordinate systems (grid) and datum conversion. It does support more than 200 predefined datums, 20 ellipsoids and 10 coordinate systemsand the ability to define your own datums and ellipsoids.
rcb is an application tool that displays resistor color codes and values. It also comes with a tutorial video.
Look at the proteins in stereo without any glasses (using VisProt3DS some people can do it). You can use VisProt3DS to look at the proteins in stereo for the scientific goals, education purposes, as a hobby, with curiosity or simply for a fun.
RadioTelephone Tutor helps you study for the FCC GROL License, plus Ship Radar Endorsement License. Drills on missed questions, can take entire question pools in straight, or random order. Creates practice tests.
Eight-channel Audio Spectrum Analyzer Real-time FFT, OscilloScope, Frequency counter, voltmeter, noise and distortion meters, phase shift meter.
Eight-channel multi-tone audio frequency sinusoidal & noise signal generator is intended for adjusting and measuring parameters of audio equipment.