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.

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.

Todo.txt - Track your tasks and projects in a plain text file, todo.txt. A todo.

Swift Social - All-in-One Social Media Growth and Management Tool

Task Coach - Task Coach is a simple open source todo manager to keep track of personal tasks and todo lists.

TitanMLM - TitanMLM is a modern multi-level marketing management software that allows businesses to manage their operations from a single platform.