Bukkit

This is a plugin that keeps fly mode on log off (until server restarts)

Allows people to sign in when server is full.

Make chat channels and custom Login/Logout Messages along with a better private message handler

A plugin which wipes out a whole players inventory and teleports them back to spawn on login

LoginPerks is a customizable rewards system that rewards your users for logging in on a regular basis via items and/or money.

Displays info to a player on Login

Permits on login remapping of group membership.

Define your own join and quit messages with colors, groups and chatnames. (Prefix and Suffix, too!)

Simple Login Nachrichten

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

LoginVip

Allow for dynamic and custom client server list and login MOTDs

Minecraft Login plugin

LoginProtector

Are you bored by Minecraft's default messages when player joins/leaves/is kicked? Use this plugin to use your own!

Allowed users to login on your server

LunarSpawn allows for easy teleportation toa set location on login.

Offline-Mode authentication plugin [Free Sourcecode]

Give new players a selected item on join

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

A simple secondary login to protect your server

Displays server player login status on an external Raspberry Pi

Allows you to create custom rank tags/server login messages/chat colors!

Custom login/logout message, customization via the config!

My First Plugin!