This is a followup on my post of a couple days back that talked about online invoicing websites Post.
A friend on twitter found this post that gives you 20 other websites that you can use to invoice your clients and keep track of your projects.
here is the link:
http://www.sitepoint.com/blogs/2009/05/02/online-invoicing-services/
The post was written and assembled by Alyssa Gregory.
Enjoy!