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.
My Daily Planner - Organize your day with pen & paper. Free printable template.
Everlist Task Manager - Groceries, trips, errands, and daily todos managed simply. get your tasks under lovely control.
The Ultimate Productivity Stack - Curated directory of tools to supercharge your productivity
Taskful - Deadlines, meet your match.
Rithm - Chat with music