Milton

Milton is a simple web-based tool that is advertised as "Giving you everything you need, and nothing you don’t need to run a small service-based business." The application features three core capabilities: Contacts, Projects, and Finances. WIth Milton, users can keep track of contacts, associate them with projects as they run their course, and produce professional-looking invoices all within the same tool. Alternatives include KarmaCRM, Basecamp, and GoPlan.