Here you can find the clean servers without ANY modifications at all. Known as Minecraft Vanilla Servers.
These servers are installed from the original server software provided by Mojang (minecraft.jar or SNAPSHOT) and no additional mods / plugins added. As a server owner you can not use Bukkit / Spigot or similar. If you want to provide Vanilla Gameplay, but with minimal server/user protection, then the server belongs in the Semi Vanilla category.
Vanilla is for the people who just want to play the game as it is.
Attention Server Owner: If your server got Whitelist enabled, be sure to whitelist user Claush, so we can verify the vanilla status. If not, we will remove it from this category.