PaperHigh performance Spigot fork that aims to fix gameplay and mechanics inconsistencies
lazydfuFabric mod that makes Minecraft DataFixerUpper initialization lazy
HoneyBEEHoneyBEE is a Minecraft server implementation written in go, with help from wiki.vg (huge thanks to them), that aims to be fast by utilising go-routines and being optimised for a low cpu/ram footprint. (Pre-Alpha)
TabTPSMinecraft server mod/plugin to monitor TPS, MSPT, and other information in the tab menu, boss bar, and action bar.