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

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

Organizes and reminds you about important events in your life.

Create and publish various diagrams to represent your idea.

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

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

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Common Math Functions

Free

Common Math Functions is a convenient tool for simple algebra calculations.