adobe lightroom and photoshop. no, darktable and gimp are not as good. darktable barely functions with a trackpad and gimp is like photoshop from 2010.
Free and Open Source Software
If it's free and open source and it's also software, it can be discussed here. Subcommunity of Technology.
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Affiinity Photo, Affinity Designer and Affinity Publisher for me. I can't afford the Adobe stuff, and the Affinity software is pretty decent, but still not OSS.
Firmware in all the consumer devices I want to hack, but don’t want to reverse engineer.
On android, i wish Xplore file manager had an alternative. Didn't find anything to replace it. Dualpane file managers are the best. (btw, its one of the app where donating to dev really feels like he deserves it ).
Any program that communicates with USB connected hardware via a non-standard, Windows only USB driver as provided by the hardware vendor. In other words, you can't just plug a device into any OS and start programing it via a standard USB driver.
Winapps moment?
Photo editing software. My wife didn't want to pay for Lightroom anymore, so we switched to a software with a one time payment, Luminar. There are some FOSS alternatives, but none of them have been a hit with her. All of them are missing something or are intended to compete with a different line of product like Photoshop, Illustrator, or ProCreate.