CiviCRM
CiviCRM is the best open source CRM software for handling fundraisers, soliciting donations from established donors, planning and hosting events, marinating membership, and - among many other functions - keeping in touch with the civic-minded individuals that fuel your nonprofit organization. This open source CRM software can be used as a standalone customer relationship management tool, or operate with identical seamlessness when integrating popular website hosting platforms like WordPress and Drupal, hauling in other employee-owned and workplace-pirated email accounts, and spreadsheets or other sources of saved information found on workplace computers. As nonprofits often vary wildly in their scope, functions, and activities, an important factor that considers CiviCRM superb to other CRMs designed for nonprofit businesses is its customizability. Not only is it entirely possible to customize your particular nonprofit's version of the program, but CiviCRM's nature as an open source software allows anybody with experience of coding to manually tailor its features to their organizations' needs.