Self-hosted ad script

Can anyone please suggest a decent self-hosted ad-serving script.

I’ve been using OpenAds but it recently won’t let me login.

Of course I prefer free open source, but am happy to pay for somehting appropriate.

What features were you looking for out of an ad server?

Directly comparable with Open Ads.

gulliver,

You may want to have a look here for options:
http://www.hotscripts.com/category/scripts/php/scripts-programs/ad-management/?RID=123001

Hope that helps.

-Bing