The Nudge - A planner friend in your pocket.
Sortd - Rated the #1 App for Gmail
Yuggler - Fun activities for kids and family!
KanbanMail - A Kanban board for your emails.
Fieldguide - A field guide for everything
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.