Minecraft username

There is a tool where you put a server Ip and it coppy all usernames? if yes can you give me the thread/ site and learn me how to use ?

There is a hacked client called weepcraft, where you can go on a server, type .scrape [name for the file] and it will save it in the .minecraft folder.

i have that hack but i want one where i wirte for ex. 20 servers and it copy all the names from the serveris something like that on twisted_tornado but i don't know how to use it