FocusWriter - FocusWriter is a fullscreen, distraction-free word processor designed to immerse you as much as...

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

iA Writer - Minimal Design, Maximum Focus

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.

Scrivener - Scrivener is a content-generation tool for composing and structuring documents.

Pomodone - Pomodone is the easiest way to track your workflow using Pomodoro technique, on top of your current task management service.