One of the best CRM currently

There is still room for improvement in the meta-box layout of custom fields, I also feel that some of the fields are redundant, for example, an organisation has a number of contacts associated with it.
A project should either be associated with a single contact for a single organisation, but not both.
A task is associated with a project and does not require to have an organisation or a contact associated with it, the project should define all of these automatically.

The implementation of the code follows WP stds, making it very easy to build on and change and augment its functionality, so a lot of potential for this plugin.