Popsicle is described as 'Write an ISO or other image to multiple USB devices all at once. Easily preparing a bunch of flash drives of your favorite OS with just a couple of clicks' and is a bootable usb creator in the cd/dvd tools category. There are more than 50 alternatives to Popsicle for a variety of platforms, including Windows, Linux, Mac, Flathub and PortableApps.com apps. The best Popsicle alternative is Rufus, which is both free and Open Source. Other great apps like Popsicle are Ventoy, balenaEtcher, UNetbootin and YUMI exFAT.