You need to be much more specific than that (What your looking for etc...).
But general details:
Website: http://www.directadmin.com
Price: $29/m direct or $200 annually or $299 one time
(VPS / Dedicated server providers get a license for as low as $9/m so first check if your provider offers it at a discounted rate or not).
We think that directadmin is great, as it keeps out of the way of customizations you make yourself, like changing the webserver used, or adding accelerators etc.