Flow - Stop managing projects from your inbox.

Toggl - Toggl is an online time tracking tool. It features 1-click time tracking and helps you see where your time goes. Free and paid versions are available.

Planndu - Planndu is a simple task manager app for individuals that helps you to improve productivity and stay focused. It has features to set reminders, status, priorities, and focus techniques to improve concentration and get more of your day.

Harvest - Simple time tracking, fast online invoicing, and powerful reporting software. Simplify employee timesheets and billing. Get started for free.

Fresboard - Notes, tasks & chat - Unified workspaces for projects

RescueTime - Time management software that shows you how you spend your time & provides tools to help you be more productive.