vicidial.org

Currently I have to press "Dial next number" after dispositioning each call while on manual dial. Is there a way to have it just do this action by default, so as soon as it is dispo'd the next lead would begin dialing?

Yep. Set the campaign to "Ratio" instead of "Manual".

However, I remember this same question a few days ago. If that wasn't you, you should find the other guy and see if between you you have enough funds to pay someone (The Vicidial Group ... PoundTeam ...) to build this feature for you. Manual autodial.