A bunch of (configurable) ingame random spawn messages:
Ingame Help Menu:
New command since v1.2.0:
/rp spawnrandom - Spawn a random rainbow at a random location (with a leprechaun) without having to wait for the random rainbow interval. (permission: rainbowspro.spawnrandom)
bStats (since v1.2.0 - 2022):
https://bstats.org/plugin/bukkit/RainbowsPro
Plugin Showcase Video by Barbercraft (3rd party)
Plugin Showcase Video by SoulStriker (3rd party)