Ndizi Project Management is a Project Management solution, akin to offerings like Basecamp. But it's free and runs under WordPress.
Ndizi Project Management is in semi-active development, meaning simply that as I have time between client projects, I'll be developing it further.
Also, as it is beta software, please use the 'Bug Report' in the plugin if you see anything break! If I'm alerted, odds are it'll be patched shortly.
Currently, Ndizi supports storing:
Ndizi also lets you select a front-end page of your site, where your clients can authenticate and view their details, invoices, projects (including time totals for each, but not the individual time reports), and each task (with status) assigned to their projects. They can also add new tasks, which are then added to the back end for you to modify, clarify, and assign as-needed.
Coming Features (in no particular order):
Contactsdata type, enabling you to associate (none, one, or more) contacts with (none, one, or more) clients or projects.
If you like Ndizi and want to make a donation, don't give it to me. Give it to people that need it. http://www.charitywater.org/donate/ (I'm not associated with them in any way, I just happen to think they do good work)