title: Payments Library for CodeIgniter
body: <p>I started a github project a few months ago when I needed an API integration with PayPal payments.  The original idea was that one should be able to use one interface to process transactions through multiple payment systems.</p>
  
  <p>I've been looking into the payments ecosystem and trying to figure out what would make really good library code for a payments interface.</p>
  
  <p>2 things I ran across were <a href="http://chargify.com/features/recurring-billing-system/" rel="nofollow">Chargify</a> and <a href="http://spreedly.com/info/payment-gateways" rel="nofollow">Spreedly</a>. They let you use their API to accept payments and process through payment gateways all over the world - the mantra being you build the app, we'll handle the billing.</p>
  
  <p>Are there any other similar sites / services that I should integrate with as well that you know of?  If you are a PHP framework user, do you have anything to add about what YOU need or want to see in a payments library?  Any potential "gotchas" or "hey, think about this" you can add?</p>
  
  <p>I appreciate it!</p>