A list of Minecraft Server Softwares
Paper - https://github.com/PaperMC/Paper - A "High-performance Spigot fork that aims to fix gameplay and mechanics inconsistencies".
Akarin - https://github.com/Akarin-project/Akarin - "Akarin is a powerful (not yet) server software from the 'new dimension'".
Nukkit - https://github.com/minecraftserverorg/Nukkit - A server software that allows you to run Bukkit Plugins for Minecraft Pocket Edition.
Kettle - https://github.com/KettleFoundation/Kettle - A server software that allows for use of Forge Mods and Bukkit Plugins in the same server.
Pumpkin - https://github.com/Snowiiii/Pumpkin - Pumpkin is a Minecraft server built entirely in Rust, offering a fast, efficient, and customizable experience. It prioritizes performance and player enjoyment while adhering to the core mechanics of the game.
Glowstone - https://github.com/GlowstoneMC/Glowstone - A Minecraft server software built from scratch.
Cleanstone - https://github.com/CleanstoneMC/Cleanstone - A Minecraft software built from scratch that also has multi-threading and a web panel.
Cuberite - https://github.com/minecraftserverorg/cuberite - Cuberite is a Minecraft Server written in C++ and designed to be efficient with memory and CPU, as well as having a flexible Lua Plugin API. Cuberite is compatible with the Java Edition Minecraft client from Minecraft 1.8 - 1.12.2
LavaBukkit - https://github.com/GMatrixGames/LavaBukkit - (Currently not in development) A server software that allows for use of Forge Mods and Bukkit Plugins in the same server
Lava - https://github.com/LavaPowered/Lava - The continuation of LavaBukkit
Note: Akarin is the continuation of Torch
BungeeCord - https://github.com/minecraftserverorg/BungeeCord - A Minecraft Proxy software that allows you to link multiple Minecraft servers together in a network
Travertine - https://github.com/PaperMC/Travertine - "Travertine is Waterfall with additional protocols." Waterfall is a fork of the BungeeCord proxy software.
Velocity - https://github.com/VelocityPowered/Velocity - A Minecraft server proxy with unparalleled server support, scalability, and flexibility.
MinecraftMultiversion - https://github.com/josephworks/MinecraftMultiversion - A Paper server with Plugins that support a vast range of vanilla Minecraft versions (1.4.7 - 1.14.4)
SpigotCraft - https://github.com/SpigotMC/SpigotCraft - A server built by the developers of spigot and for people wanting to learn how to create a Minecraft server
PaperTestServer - https://github.com/PaperMC/PaperTestServer - A server built by the PaperMC team for testing out latest / beta releases of paper with beta / snapshots of plugins
ProtocolSupport - https://github.com/minecraftserverorg/ProtocolSupport - A plugin that allows minecraft players to connect to a server using 1.4.7 - 1.12.2 on a 1.12.2 server
ServerBuilder - https://github.com/josephworks/serverbuilder - Builds you a minecraft server using shell script