membership

Transforming ecourses into vibrant communities of action and learning. — Courses That Matter

Some really useful-looking services for course creators.
WPDesigner » How to Use WordPress as a Membership Directory

This brief tutorial could come in handy… I’ve done something similar but didn’t document it, so this is a great reference should I need to do it again.
WP-Members : ButlerBlog

I occasionally get asked about doing members-only sections in a generally public blog. This looks like a good option.
Membership software – aMember Pro

I’m using this for an upcoming client project. The word on the street is that it’s the best solution for membership-based sites.
NetworthIQ: My Networth

This site lets you track your net worth over time. Kind of handy. I need more info from Daniel to get it all entered in properly, though.