It's far less of a CRM and a marketing automation app than most of the apps on here, but it fills an important niche for businesses with more calls than clicks. You can take your sales calls in the web app, track info about each of the callers, and CallTrackingMetrics will let you know which page or ad the user saw when they called. There's even SMS automation so you can send text messages to potential customers, following up even when there's not an app for them to keep using.
Marketing automation is the use of software to automate marketing processes such as customer segmentation, customer data integration, and campaign management. The use of marketing automation makes processes that would have otherwise been performed manually much more efficient, and makes new processes possible. Marketing automation is an integral component of customer relationship management.
Contact-focused CRMs are one of the best ways to maintain a personal touch with your customers and business contacts, since you'll have one place to keep track of everything about them. Hatchbuck gives you that same contact-focused interface combined with even more detail about each person related to your company. It has a bit more focus on the traditional ways you'd gather leads—especially via forms—than the other apps listed here, and instead of focusing on every possible visitor it's just focused on the important leads you import or that fill out your forms.