What free software or program is so good you can't believe it's free?
By - DronPl
IrfanView, G.I.M.P., & Inkscape.
Visual Studio Code
VLC Media Player
There is no software I cannot believe is free because I find that in many cases free/open source software is considerably higher quality than paid proprietary software, so I've come to expect the free/open source option to be better-quality by default, although oftentimes not quite as featureful or user-friendly. But even if features and UI are sometimes lacking, I still strongly prefer free/open source software, especially for work, as it tends to be faster, more reliable, and less exploitive, with no predatory subscription models, vendor lock-in, etc.
> faster, more reliable, and less exploitive, with no predatory subscription models, vendor lock-in,
Ah, sounds like you were bitten by Adobe, too.
Gimp, Inkscape and FreeCAD.