Netron is a visualizer for neural network, deep learning, and machine learning models. It runs on macOS, Windows, Linux and in the browser.
.NET Reflector is a class browser and documentation viewer to easily view, navigate, search, decompile and analyze .NET assemblies in C# and IL.
Imago Orpheus is/was a track based music editor and software synthesizer that allows editing of music tracks in a matrix-like editor.