Get all the essentials with a free email marketing account from Cakemail.
MailChimp - MailChimp is the best way to design, send, and share email newsletters.
CiviCRM - A Constituent relationship management for the Civic Sector
BizConnector - BizConnector offers marketing and workflow automation solutions to small businesses.
Odoo CRM - Open Source CRM
HubSpot - Grow Better With HubSpot: Software that's powerful, not overpowering. Seamlessly connect your data, teams, and customers on one CRM platform that grows with your business.
Salesforce - CRM software solutions and enterprise cloud computing from salesforce.com, the leader in CRM and platform as a service.