Weak signal ham radio communication
Cross-platform, scientific graphics plotting library
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Snd is a sound editor
Unix Tools For Windows
View, manipulate, analyze (LS fit, SVD, FT), and make figs of, spectra
Build Systems for WSJT Applications
A full featured cross-platform image library
Ultrascale Visualization Climate Data Analysis Tools
gMol molecular graphics
PHIGS (Programmer's Hierarchical Interactive Graphics System)
PET/PEM image reconstruction based on MLEM