AustLII is the leader in the free access to law movement and has a philospophical bias towards open source systems. After investigating all the other possible major alternatives it seemed logical to turn to CiviCRM. We have software developer resources, and though it is not core business, we may be able to direct some of these resources towards improving CiviCRM for the community.
I work for the Electronic Frontier Foundation. We switched to CiviCRM so that we could be sure that our membership data stays safe, secure, and private. Now we have control over our CRM and can customize it to work for our needs.
ISBA is an international non-profit society with members from all over the world. We have sections that represent different scientific areas and chapters that represent different regions of the world. Civi Member powers our membership system! We use CiviEvent for Conference and Workship registration, and utilize CiviPetition for creating new sections to our society through member petitions. We are epxloring how CiviGrants can be used to track our travel awards and look forward to features for integrating accounting and finance. As a growing non-profit CiviCRM plays a major role in managing our membership system!
Civi empowers organizations to maintain the data of the people they serve on their terms. The community is welcoming, happy to share and eager to document. I know where to look or who to message, that is priceless.
Over the past 15 years I've been involved in several open source communities.
CiviCRM is without any doubt the one that has the strongest focus in welcoming "newbies" and letting everyone feel at home here. Another impressive feature is the focus on shipping. No matter what you think of CiviCRM today, you are almost sure that there will be a newer and better version in a few months.