Newunionism.net is a website recommended here in the past for a bunch of reasons. Here’s another: a free open source membership records management system for unions with less than 5,000 members.
The system is being developed by two Newunionism.org members. Discussions on the site had identified the need for local unions with smallish memberships to have access to an expensive way to manage member records.
MemBrain should be ready for release by the end of the year. The developers are looking for volunteers to test the software before then. If your union has about 5,000 members or less, how'd you like to become a guinea pig in helping them develop the system? In return, you get a fully-registered copy of the membership system and the code access necessary to developing it further. For more information on the MemBrain project, and how it might help you in your work, contact firstname.lastname@example.org.
And if you’re not ready to become a beta tester, look for the first wide release of MemBrain in early 2009 at http://www.newunionism.net/.