I have a few app which are run by anouther app which is a CRM all are created useing caspio.
You can take a look at one which I have a kind of demo version available (not all the apps are completed yet)
http://sub-bid.com/app_Demo/projects/pr ... State.html
This will give you a idea BUT the first thing you would want to do if wanting to creat a CRM is find a admin skin or creat one.
feel free to email me direct