The opentaps CRM2 Extension for Magento is now available in Magento Connect:
This extension is a simple widget (see the code on GitHub) that gives you the most useful features of a CRM system directly in Magento, without implementing a separate CRM. You’ll be able to see all your team’s emails and discussions around your customers and sales orders, create and manage tasks, and upload and manage files. All this happens in Magento, without need for a separate system or complicated integrations.
For screenshots and to install it, see opentaps CRM2 Plugin in Magento Connect.