Free and Open Source Software

Hi everyone,

Feel really embarrassed asking this as I see it mentioned in comments and posts all the time but now, for the life of me, cannot find any record of it.

There is a tool that allows you to create and store multiple OS ISOs on a bootable USB. Apparently after it's created, you can simply drag and drop any ISO on to it.

Anyone know what it is/called?

Thank you in advance!

EDIT: Thank you all for the quick response! Looks like Ventoy is the most common app for this. Netboot was also mentioned so will check this out as well. Thank you again :)