Currently I'm using Plesk 10, and I simply don't want to have to keep renewing every month as it's quite a cost out of pocket for running my server domains and subscriptions.

I'm basicly just inquiring to see if anyone knows of, or has any experience or input on any third-party or open-source solutions that are at no cost. I've heard of a few solutions but it's hard to depict it from quickly searching google a couple times over the last week.