As a company, we have various recurring fees which our clients pay - these can include:

• hosting plans
• maintenance agreements
• SLAs
• ...

I would like to know if anyone knows of a good, web-based recurring billing / payments management system which we could use to help us get more organised regarding this aspect of our business. Basically, we would need to:

• Create recurring profiles, e.g: Hosting, emails / domain services @ 200eur / year
• Be able to give free / extend the subscription period, for any reason.

Also, we don't have specific products which we would like to choose and charge - all these recurring fees are discussed with the clients, and are created on a per-client basis.

I'm not sure if this is the best place to ask for, however since I think most 'webmasters' require such a system to keep track of payment, I thought this would be the place to go for.

Thanks in advance!