Typefully - Write & publish great tweets, without distractions
Streaks - The to-do list that helps you form good habits.
Minimal Twitter - A distraction-free browsing experience for the new Twitter
ProductiveApp.io - Productive is a habit tracking application.
Tweet Tray - Tweet quickly from your desktop without any distractions.
Habit List - Create good habits and break bad ones with the app that keeps you focused.