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

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.

Organizes and reminds you about important events in your life.

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

Create and publish various diagrams to represent your idea.

Windows

Windows Mac

Eric Skroch

Core Plot

Free

2D plotting customizable framework capable of drawing many types of plots.