Are you familiar with them? Which one is your favorite?

Also, I would like to ask if you know any good programs to making an Online Private Server?
Me, my boyfriend and his sister are going to make are own for everyone to use. i was just wondering if you know of any FREE programs that would make it online. If not list some things that you would like to have in the server.

(Accidentally put this in the wrong subject before. >.<)