KeyCastr, an open-source keystroke visualizer
Mac app that shows all open files, directories, sockets, pipes, etc.
SADSA (Software Application for Data Science and Analytics)
Social Network Analysis and Visualization software
Interactive error messages for the Julia REPL
A plugin to use Free Sketches with SysML models to support MBSE
Spectroscopy Viewer
Simple interactive menus for the terminal (Now ships with Julia!)
3D Charts - Templates for PovRay(TM)
An interactive pi walk.
jchart2d is a real-time charting library written in java.
qwt draggable graph rulers
On-screen keyboard that highlights keys that are pressed.