Windows+Visual Studio. I run them in a VM, and for a while managed to keep it at 50GB, but combine it with a moderately large hit repo and you can just give that up. And yes, I know vscode is a thing, but there always ends up being some legacy/COM/platform specific library that makes it non-compatible.
Adobe After Effects. Despite being an unstable spaghetti code nightmare, there is no other viable option for professional motion graphics designers.
I want to jump to linux, but the prospect of starting from scratch on a new OS (or even a reinstall of windows) is just not feasible right now.
firmware/drivers
Onenote! I use it for school and work, and love the syncing capability and the flexibility in structuring and organizing my notes. I also like the keyboard shortcuts and the way it can dock to a side of the screen to keep the main content visible
Sublime text. It is just so fucking good! Much more performant than even nvim.
Intuit software, specifically TurboTax. This also may become obsolete to replace if the IRS will give out free software as rumored for next year, but I'm surprised nothing as intuitive ^pun ^heh or user-friendly has popped up. Maybe I need to do more research, not sure.
Nationwide banking.
Pretty much anything on my phone. Though I have recently found f-droid, and through that I found Phonograph. I wish open street maps could replace google maps, but I really don't know what it's trying to do.
Depends on your country, but where I live Open Streetmap is better than Google's map. I hear OsmAnd is a great app, but I don't use a smartphone so I haven't tested it. I just know that their very compact offline maps are impressive.
I prefer Organic Maps as an OSM Android App, I've found it to be a bit easier to use and more reliable than OsmAnd!
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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