Some are more ancient than my Mathcad 8 Pro [2000]
All freeware, most used wrt the forum help: IrfanView, WinGrab
1. WASp is limited to 3 min session, unlimited number of sessions.
2. Uconeer: exceptional unit converter
3. Spline2X: special applications data smoothing
4. Color: color pic [speaks by itself]
5. Calipers: image pixels coordinates
6. Tracer: advanced digitizer [mostly for web crappy plots]
7. Charmap: once in a while useful in Smath.