Paying HOA Fees Online

I am a web developer, creating a website for a Property Management company. One of the requirements is for their clients to be able to pay their association fees online.

I told them I would investigate some of the third party vendors available and get back to them. Does anyone have any experience (good or bad) with any particular company? I've seen a few sites using InvoiceCloud.com, RentPayment.com and DuesPayment.com - any recommendations or advise?

Thanks!
Ron

I have used erentpayment.com and I have looked at many other sites, Buildium is what I think I will be using starting in a few months. I don't know what all you are building into the site, but Buildium may duplicate a lot of what you are making. You could look at services like PayPal to build into their site to accept payments.

Thanks Kyle, I'll look into both of those sites!