Evernote is a free app for your smartphone and computer that stores everything you could possibly imagine losing track of, like a boarding pass, receipt, article you want to read, to do list, or even a simple typed note.

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The app works brilliantly, keeping everything in sync between your computer, smartphone, or tablet.

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The basic version of Evernote is free, but it limits you to adding 60MB of new notes a month, lets you sync between only two devices, and doesn't include advanced features.