ScyDev Drupal7 CRM
This is a very simple CRM tool put together with Drupal7 and some modules.
In fact, it is so simple that it only contains time logging for tasks/customers and automatically creating invoices.
No coding was necessary except for a few lines of PHP to calculate the totals in the Views module. Which means this is just a bundle of Drupal7 and some modules and the actual work is in the configuration in the DB dump.
