UBB.Developers Forums General Discussion Chit Chat PHP/MySQL invoicing software?

I'm looking for any recommendations on PHP/MySQL-based invoicing software packages - for clients, not forum members. Free is good but packages with a nominal fee are fine. I've been scouring the PHP resources but am looking for any first-hand recommendations.

Thanks.

Here you go

http://www.hotscripts.com/cgi-bin/search.cgi?bool=AND&query=billing&catid=2

Thanks Jeremy - I had run across Hotscripts in my search and several of those packages. I am still looking for recommendations. We need s/w to manage advertiser invoicing.