- UNetbootin
I find it hard to recommend a project that hasn't received any development in over two years.
- Balena Etcher
Unfortunately, balenaEtcher has allegedly become spyware. (Or there are at least concerns surrounding it.)
- Ventoy
This used to be my favorite tool for this. However, even after 16 months have gone by and two different issues have been opened to address the same problem, it hasn't resulted in replacing the (binary) BLOBs by reproducible ones. Hence, security-conscious projects like secureblue have started to recommend against the use of Ventoy for installing their images.
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Universal USB Installer
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Yumi
Still going strong over all these years. Though it's AFAIK the only piece of software that doesn't host the code on GitHub (or similar platforms), but instead seems to rely on its Contact page for bug and issue reports. FWIW, they do employ Ventoy's bootloader. Unsure how this relates to the aforementioned concern related to (binary) BLOBs.
- PowerISO
This ain't even open source. You can order your copy from here.
- MultiBootUSB
Hasn't received any development in over 5 years.
- ImageUSB Writer
Is this even open source?
This leaves us with:
- Rufus
Great to leave M$ for Linux. Unfortunately, it's only distributed as .exe's. Nor is its maintainer interested to support Linux.
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GNOME Multiwriter
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Fedora Media Writer
Ah..., finally, we get to the "by and for Linux". Though, there are about a dozen or so that the article doesn't mention.