Server Tool
The Bukkit world management plugin: create, load and travel between multiple worlds on one server.
Multiverse-Core is a Minecraft world management tool for Paper, Spigot, Purpur and Bukkit, listed under World Management & Pregeneration Tools. It lists support for Minecraft 26.3 and 26.2. It is free.
From the source listing
Multiverse-Core lets a server host several worlds with their own settings and move players between them. It runs on Paper, Spigot and Purpur, is published under the BSD licence and has documentation at mvplugins.org.
From the source listing
Same category
Most recently approved first. This is not a recommendation or a ranking.
World Management & Pregeneration Tools · Server Tool · by pop4959
Pregenerate chunks quickly and efficiently so players do not trigger expensive terrain generation while exploring.
Paper · Spigot · Folia · +5MC 26.3 · 26.2
Folia support · Open source
Server Diagnostics & Analytics Tools · Server Tool · by AuroraLS3
Monitor player activity and server performance over time in a web interface, across servers and proxies.
Paper · Spigot · Velocity · +6MC 26.3 · 26.2
Folia support · Open source · +3
Server Diagnostics & Analytics Tools · Server Tool · by lucko
A performance profiler for Minecraft clients, servers and proxies, with shareable reports.
Paper · Spigot · Fabric · +3MC 26.3 · 26.2
Open source