MultiMC is described as 'Free, open source launcher for Minecraft, managed by Forkk13and peterixxx. It allows you to have multiple, separate instances of Minecraft (each with their own mods, texture packs, saves, etc) and helps you manage them and their associated options with a simple' and is a minecraft launcher in the gaming software category. There are more than 25 alternatives to MultiMC for a variety of platforms, including Windows, Linux, Mac, Flathub and Flatpak apps. The best MultiMC alternative is Prism Launcher, which is both free and Open Source. Other great apps like MultiMC are ATLauncher, Lunar Client, Crystal Launcher and PrismLauncher Cracked.
X Minecraft Launcher (XMCL) is a modern Minecraft launcher that lets you manage your massive resources like modpacks, resource packs, mods, shader packs... It also has integration with Minecraft Forge, Fabric, Quilt, CurseForge and Modrinth.
UltimMC is a custom launcher for Minecraft which allows you to manage multiple instances and use offline ("cracked") accounts while keeping as close as possible to the original.
HMCL is a cross-platform Minecraft launcher which supports Mod Management, Game Customizing, Auto Installing (Forge, Fabric, Quilt, LiteLoader and OptiFine), Modpack Creating, UI Customization, and more.
Natsurainko.FluentLauncher A Minecraft launcher designed for Windows 11.
Mineshafter is the most popular Web-based alternative to MultiMC.
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Mineshafter is an authentication server for Minecraft, while MultiMC is an launcher for Minecraft.