RescueTime - Time management software that shows you how you spend your time & provides tools to help you be more productive.
Codetree - You can manage your entire development process through GitHub.
Prio - Beautiful task lists and reminders
16bugs - 16bugs is an all-in-one bug tracking software that makes it easier for you to manage all sorts of bugs in performance with the simple interface; ultimately, you will be more productive for sure.
Trevor A.I. - Personal assistant that helps you manage your time
Bugify - Bugify is a simple PHP issue tracker, designed to offer powerful bug tracking capabilities in an easy to use system.