Microsoft To-Do - Task management tool
Motion Firefox - All-in-one time management tool in Firefox
Gone - An ephemeral to-do list
Task Muncher - Task Muncher is a cross-platform and web-based application that is designed to organize and keep the track of everything and focus on munching the weekly tasks.
KosmoTime - The to do list with super powers
TManager - TManager is the best hub for terriaria mobile players and communities.