Counter-Strike
Best for Counter-Strike 1.6 is free.
The main principles of the plugin are convenience for Players and Server Administration, menu plugin will help you get rid of self-written commands in the chat: reset an account, look at the list of the best players on the server, view personal statistics, look at your rank, open the vip menu (if you have it), change the map by rtv voting or nominate any server map, stir up the player and even that's not all ... You can also add your commands to the menu, they are easily added and edited in the plugin config, which is present in the archive in the place with the plugin and source.