Land Protection & Claim Plugins · Plugin · by TownyAdvanced
A town and nation system: players found towns, claim plots together and manage land with an in-game economy.
Paper · Spigot · Purpur · +2MC 26.2
Folia support
Plugin
Protect areas of your world with regions and flags: control building, PvP, mob spawning and other rules region by region.
WorldGuard is a Minecraft land protection plugin for Paper, Spigot, Folia and Bukkit, listed under Land Protection & Claim Plugins. It lists support for Minecraft 26.3 and 26.2. It is free.
From the source listing
WorldGuard lets staff define regions and set flags on them to allow or deny actions such as building, fighting and explosions. It works together with WorldEdit, which it uses to define regions, and it runs on Paper, Spigot and Folia. It is maintained by the EngineHub team and published under the LGPL.
From the source listing
Same category
Most recently approved first. This is not a recommendation or a ranking.
Land Protection & Claim Plugins · Plugin · by TownyAdvanced
A town and nation system: players found towns, claim plots together and manage land with an in-game economy.
Paper · Spigot · Purpur · +2MC 26.2
Folia support
Land Protection & Claim Plugins · Plugin · by GriefPrevention
Self-service land claims: players protect their own builds with claim blocks and trust lists instead of needing staff.
Paper · Spigot · Purpur · +1MC 26.3 · 26.2

Lobby Display Plugins · Plugin · by zArrowTan
A ready server lobby on a tropical jungle build: server selector NPCs with live player counts, leaderboards, crates, 14 chat tags and a hex-styled TAB and scoreboard.
Paper · BungeeCord
Guides
Prevention, claims and repair are three separate jobs. How to combine regions, player claims and a block log without overlapping them.