ajax CRM software

We need a simple, email integration Customer relationship Management software. It need to have all basic features of CRM (leads, reports, calendar (gmail), appointments, pending/ confirm/decline) anything you can think o Email integration (preferable integrate with a known email marketing company) simple to understand nothing complicated! if you have this already develop we will buy it, no need special customization as it have all basic features of a CRM. *we looking to buy one rather than develop one from scratch. Chan