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Organizes and reminds you about important events in your life.

Create and publish various diagrams to represent your idea.

It is designed for Mac and iPhone users to make lists and stay organized.

Momentum is a powerful habit tracker that boosts willpower and helps you reach your goals.

Find out how millions of users worldwide have revolutionized the way they think.

Free open source todo manager. It grew out of frustration about other programs not handling composite tasks well.

Windows

Windows Mac

Mike Filippone

PEMDAS

Free

Perform various calculations.