Auto-Join

Hey

I need a program for alteriwnet
I need to do :
auto join on a server or a list of servers

i'm sometimes annoyed when i can't find a spot on a server and when i go back to another server it's full
basic i need a tool that will connect to a server see if there it's any left spot
and if it's stay there or if isn't go to the next server on the list
custom list of servers too

if you can help me i will appreciate

that would be hard
you can make an auto connector but how to make it so it stops when u joined a server?