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Flameshot, an Open Source screenshot software
(lemmy.sdf.org)
Features:
- Highly customizable
- In-app screenshot editing
- Upload to online platforms
- Command-line interface (CLI)
Platforms:
- Linux
- Windows
- MacOS
Link: flameshot.org.
For Windows, I recommend ShareX. It feels more modern than Greenshot, has more features and is more customizable. And it's open-source: https://github.com/ShareX/ShareX
I've been using lightshot for years and love it, might have to try others out just to see what else is out there
Edit: Been using ShareX for a little bit today, and yes. it is superior to lightshot