Recommended. One of the Best Small Business CRM’s, Relenta Free Forever single user version is a great solution if you want a strong CRM. Please note though, it’s restricted to 100 contacts, with no email marketing. Upgrade to their advanced version with ease later if need be. Relenta uses David Allen’s famous Getting Things Done (GTD) principle. Relenta put the complexity of multiple emails into a simple and elegant CRM workspace that will revolutionize the way your team engages your customers. By automatically inter-linking all of your data and communication activity, Relenta ensures that tasks are completed with no wasted time and interruptions. Pricing starts at $39 per user per month. A free trial is available.