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

View, sign, annotate, and print PDF files on your Mac.

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

Create and publish various diagrams to represent your idea.

Organizes and reminds you about important events in your life.

Organize your life and keep track of what you've done and what you have to do.

Windows

Windows Mac

LilyPond Software Design

LilyPond

Free

open source package to create beautiful music notation