Weasis
Science
Free medical DICOM viewer
C-based 1D Heat Equation Simulator
An interactive, C-based simulator for the 1D heat equation using a finite-difference method (Crank-Nicolson) and the Thomas algorithm. The application prompts for parameters and uses gnuplot to visualize the simulation results in real-time.
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Free medical DICOM viewer
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Image processing and analysis

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sigrok suite (sigrok-cli and pulseview)
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Free offline maps for everyone
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Curve fitting tool
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Graph Calculator
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Frontend to mathematical software
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A graphical user interface for Maxima, a powerful computer algebra system
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Mathematical Function Plotter
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Periodic Table of Elements