Geyser - A bridge/proxy allowing you to connect to Minecraft: Java Edition servers with Minecraft: Bedrock edition.
McMyAdmin - McMyAdmin is a web interface and administration utility for Minecraft Survival Multiplayer (SMP)...
PaperMC - Paper is a fork of the Spigot server implementation (which is itself a fork of CraftBukkit). Paper strives to bring improved performance, more features, and more APIs for developers to build awesome plugins with.
Pterodactyl - Pterodactyl is the free game server management panel designed by users, for users.
Pufferpanel - It's made for hosting your Minecraft server. It's open source.
Multicraft - Multicraft is a Minecraft multi-server management solution running thousands of servers.