Trello - Infinitely flexible. Incredibly easy to use. Great mobile apps. It's free. Trello keeps track of everything, from the big picture to the minute details.

Hay day - Farm with friends and family

Drag for Gmail - Transform Gmail into organized To Do lists (like Trello)

FarmVille - FarmVille lets players cultivate their farms by plowing, planting and harvesting crops and trees.

KanbanMail - A Kanban board for your emails.

Farm Up - Farm Up is a marvelous, Action, Farming, Social Interaction, Single, and Multiplayer Simulation created and published by Realore.