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

Organizes and reminds you about important events in your life.

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

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.

Create and publish various diagrams to represent your idea.

Windows

Windows Mac

Dr Alex M Clark

SketchEl

Free

Interactive chemical molecule sketching tool, and molecular spreadsheet data.