Implements #752 and gives credits to manuelgu :)

src/main/java/com/intellectualcrafters/plot/commands/MainCommand.java

@@ -128,6 +128,7 @@ public class MainCommand extends CommandManager<PlotPlayer> {
         createCommand(new Done());
         createCommand(new Continue());
         createCommand(new BO3());
+        createCommand(new Middle());
         // set commands
         createCommand(new Owner());
         createCommand(new Desc());

src/main/java/com/intellectualcrafters/plot/commands/Middle.java

@@ -0,0 +1,48 @@
+package com.intellectualcrafters.plot.commands;
+
+import com.intellectualcrafters.plot.config.C;
+import com.intellectualcrafters.plot.object.Location;
+import com.intellectualcrafters.plot.object.Plot;
+import com.intellectualcrafters.plot.object.PlotPlayer;
+import com.intellectualcrafters.plot.object.RegionWrapper;
+import com.intellectualcrafters.plot.util.MainUtil;
+import com.plotsquared.general.commands.CommandDeclaration;
+
+/**
+ * Legally stolen from https://github.com/manuelgu/PlotSquaredMiddle
+ *
+ * @author manuelgu, altered by Citymonstret
+ */
+@CommandDeclaration(
+        command = "middle",
+        aliases = { "center" },
+        description = "Teleports you to the center of the current plot",
+        usage = "/plot middle",
+        category = CommandCategory.TELEPORT,
+        requiredType = RequiredType.PLAYER
+)
+public class Middle extends SubCommand {
+
+    @Override
+    public boolean onCommand(PlotPlayer player, String[] arguments) {
+        final Location location = player.getLocation();
+        final Plot plot = MainUtil.getPlotAbs(location);
+        if (plot == null) {
+            return sendMessage(player, C.NOT_IN_PLOT);
+        }
+        if (!plot.hasOwner()) {
+            return sendMessage(player, C.PLOT_UNOWNED);
+        }
+        if (!player.hasPermission("plots.middle")) {
+            return sendMessage(player, C.NO_PERMISSION, "plots.middle");
+        }
+
+        RegionWrapper largestRegion = MainUtil.getLargestRegion(plot);
+        final int x = ((largestRegion.maxX - largestRegion.minX) / 2) + largestRegion.minX;
+        final int z = ((largestRegion.maxZ - largestRegion.minZ) / 2) + largestRegion.minZ;
+        final int y = MainUtil.getHeighestBlock(plot.getWorld().worldname, x, z) + 1;
+
+        player.teleport(new Location(plot.getWorld().worldname, x, y, z));
+        return true;
+    }
+}