Bukkit

Increase the security of your server and protect your account from unauthorised logins.

Login at a fixed location, manually teleport back to logout location

Login System to protect accounts from spoof and steal itens

LoginSecurity

Easy to use (offline-mode) login authentication plugin

Easy login plugin for your server.

Sick of always typing /login password? We got you back, simply have some specific files on your computer and it automatically authenticates!

Lets players keep all their health if they logout and login

Easy to use (offline-mode) login authentication plugin

Use custom messages and server changelog to let players know when someone's joined!

Give players custom rewards for playing daily!

Displays server player login status on an external Raspberry Pi

(AuthMeReloaded) The most famous and used /login|/register plugin!

Offline-Mode authentication plugin [Free Sourcecode]

Links players IP address to their username upon first login. Allows hosting of legacy servers without the need for authentication passwords or login servers.

Make staff or players have to log in.

Rewards Player's daily login - frankly (UTC 00:00:00-23:59:59)

A simple secondary login to protect your server

Minecraft Login plugin

Show a picture of your player's head in chat when they join! Very configurable.

LoginSeguro plugin of login System

Fake logging in or logging out of a server

Allowed users to login on your server

Execute commands when players join you server.

Login security to prevent player impostors.