Emacs has a package called autocomplete [0] that does what you want, but for some languages you have to configure it yourself. I believe vi has something simila

Emacs has a package called autocomplete [0] that does what you want, but for some languages you have to configure it yourself. I believe vi has something similar. [0] http://www.emacswiki.org/emacs/AutoComplete http://www.emacswiki.org/emacs/AutoComplete