CiviCRM
CiviCRM is a piece of customer relations management software that is open source in nature, meaning it can be updated and improved by anyone using the software. It was built by a group of supporters and contributors who wanted to help non-profits and civic-centered organizations better reach their potential customers. CiviCRM can easily integrate with just about any website, and it has a full set of comprehensive features that be used as soon as it is installed. The Core Team is the group that actually organized the construction of the CiviCRM software. They are dedicated to keeping the software working at maximum capacity while also improving and evolving it even further. Anyone can join the CiviCRM team if they wish to help with the software. The software is worth the amount of time and energy that has been put into it. If you need open source CRM software, trust CiviCRM.