Google Calendar - Spend less time managing your day & more time enjoying it
My Daily Planner - Organize your day with pen & paper. Free printable template.
Mixmax Calendar - The fastest way to schedule meetings with anyone, anywhere
Amazing Marvin - Customizable personal productivity tool
Clean Google Calendar - Makes Google Calendar look nicer & launches as a desktop app
FocusList - Daily planner & focus timer based on timeboxing and pomodoro