CiviCRM is one of the very few nonprofit focused free and open source applications. It can be a powerful tool for nonprofit organizations. You can use it to track donors, send blast emails, set up events, and do case management. Learn about the details of implementing and using CiviCRM.

Date/Time: Tuesday April 29th, 11:00 AM PT / 2:00 PM ET

This webinar will be conducted by the CiviCRM team, so it is a great opportunity to get all of your questions about CiviCRM answered. Find more detailed info on their blog. Register on the NTEN site.

The next NOSI/NTEN webinar will be on CiviCRM, and will be conducted by the CiviCRM development team. They will give an overview of CiviCRM, examples of its use, and there will be lots of time for questions. Register on the NTEN Site. More details about the webinar are on the CiviCRM blog.

"CiviCRM":http://civicrm.org/, which is, as they say, "a powerful contact, fundraising and eCRM system that allows you to record and manage information about your various constituents including volunteers, activists, donors, employees, clients, vendors, etc. Track and execute donations, transactions, conversations, events or any type of correspondence with each constituent and store it all in one, easily accessible and manageable source."

I've been watching it develop, and they've now started to "document their architecture":http://civicrm.org/node/91

It's worth a look.