ATLauncher is described as 'Minecraft launcher that allows you to easily play modded Minecraft' and is a minecraft launcher in the gaming software category. There are more than 25 alternatives to ATLauncher for a variety of platforms, including Windows, Linux, Mac, Flathub and Flatpak apps. The best ATLauncher alternative is Prism Launcher, which is both free and Open Source. Other great apps like ATLauncher are Shard Launcher, MCRAFT.FUN, PineconeMC (formerly ElyPrism Launcher) and Freesm Launcher.
Catalyst is a free and open-source tool for hosting Minecraft servers on your own computer or server. It gives you an easy dashboard to create, start, stop, manage, and monitor your servers without needing to use the terminal all the time.
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