Balena Etcher is a writer that does one ISO at a time. Other similar options are Fedora Writer, Rufus, etc.
Ventoy is one that can do multiple ISOs and is generally easy to manage.
However, be aware that Ventoy has a lot of unknown code involved. There's binary blobs that the maintainer refuses to open source, so there's a big question over whether it's hiding some malware or is using unpatched packages. Nobody knows except the maintainer, and it's just his word saying it's safe. You could use it to test out ISOs, but I wouldn't personally use it to actually install a system.
Also, the Ventoy fanbois are pretty insufferable, and they tend to brigade anyone that speaks ill of Ventoy or its dev.
If you want something similar that's open source, Glim works and could be a good option; YUMI has been around for a while, but I dunno if it's still a good project or not.
Edit: typo