EssentialPIM - EssentialPIM is a free Personal Information Manager that keeps up with the times and lets you manage appointments, tasks, notes, contacts, password entries and email messages across multiple devices and cloud applications.
Swift Social - All-in-One Social Media Growth and Management Tool
Todo.txt - Track your tasks and projects in a plain text file, todo.txt. A todo.
Synthesio - Synthesio is a social intelligence tool or a marketing software that is specially made for the purpose of social media monitoring and social analytics.
Task Coach - Task Coach is a simple open source todo manager to keep track of personal tasks and todo lists.
LeadsRX - LeadsRX is a marketing attribution software that gives marketers insights into which advertising campaigns result in conversions.