Most classic plugins are in Fast main topics in dedimania
forum, tm-forum, and french tm forum !

http://dedimania.com/SITE/forum/viewtopic.php?id=102
http://www.tm-forum.com/viewtopic.php?f=126&t=14211
http://www.trackmania.com/fr/forum/viewtopic.php?t=26605


Here are some other plugins...

* plugin.99.mywelcome :
  Will popup a manialink message at player connection
  (unless if was on server less than delay ago)

* plugin.99.mymessage :
  Plugin which send to chat automatic messages every x minutes,
  at map start, or such...

* plugin.99.podiumlogo :
  Plugin which show a logo/image during podium

* plugin.99.forcemod :
  Force random mods, can be used to set loading screens (adapted)

* plugin.99.jeudepiste :
  Plugin which when a player finish put him spec and show a popup
  (mainly to give a link to go the next server to play next map)

Note: These plugins are given as is, and can be used at your own risks.