Ways to play old versions of Minecraft - NeRdTheNed/RetroWrapper GitHub Wiki

RetroWrapper: installer for the vanilla launcher, MultiMC instance.
BetaCraft: launcher for old versions, seperate skin and sound proxy for use outside of the BetaCraft launcher.
MineOnline: launcher for old versions.
MCPHackers/LaunchWrapper: BetterJSONs can be used with the vanilla launcher, main repo includes instructions for use with MultiMC.
Prism Launcher - A legacy skin fix is included with Prism Launcher, and more legacy fixes will possibly be added in a future release. It also includes support for using M1 LWJGL natives on macOS, and ARM LWJGL natives on Linux, which may fix fullscreen issues and crashes.