HubSpot CRM - Free CRM software for small businesses.
Demandbase - Bizo
Less Annoying CRM - A simple customer relationship manager made just for small businesses. Manage contact info, track leads, and never miss a follow-up.
Triblio - Triblio is an account-based marketing software that enables marketers to personalize multichannel campaigns to reach their target audience.
Keap - Grow Sales. Save Time. Get Organized.
6sense - 6sense is a B2B predictive intelligence engine for marketing and sales.