Currently using, in random order
- pandoc – swiss army knife of document parsers/converters/compilers
- VS Code
- markdown toc
- plantUML – scripted UML creation.
- clang-format
- pycharm – a very good Python IDE
- openSCAD – script driven CAD software
Have used in the past and still like
- IPE (by Ottfried Cheong) – creates 2D PDF/EPS drawings
- Blender
- Inkscape
- GIMP
- pSpice
Games are, technically, software, but the are different. Here is a very incomplete list of games I have loved (or hated).