Sprout Invoices is a WordPress plugin that allows freelancers to manage the entire project and invoicing process within their WordPress site. It integrates estimate requests, project discussions, estimates, invoicing, and payments into one platform. The plugin features include automatically creating client profiles from estimate requests, keeping notes private to provide accurate estimates, and sending invoices without logging into another program. Sprout Invoices also facilitates deposits and has recently teamed up with ApproveMe to provide digital e-signature capabilities for contracts and estimates.