Tendenci

Tendenci - The Enterprise Open Source AMS (association management software) - Has always been at the forefront of technology with regard to meeting the needs of associations and nonprofits with Open Source. Tendenci is built specifically for Non-Profits like Associations & Organizations to help you manage your content, grow your membership organization and communicate with your online Community. While built for NPOs, many businesses use it as well similar to how Wordpress is used for businesses.