Editorial is a plain text editor for the iPad with powerful automation tools and a beautiful inline preview for writing Markdown.

You can combine a large selection of simple text processing actions into your very own workflows.


Pythonista is an integrated development environment for writing Python™ scripts on iOS. You can create interactive experiments and prototypes using multi-touch, animations, and sound – or just use the interactive prompt as a powerful calculator.

PDF Highlighter

Highlighter is a powerful PDF reader with advanced annotation tools and an intuitive, polished interface.

You can highlight important passages in your documents, add text notes and even freehand sketches — all saved directly to the PDF file, so that you can review them later on your Mac or PC using standard software like Acrobat Reader.

Open Source


AppSales allows iOS and Mac App Store developers to download and analyze their sales reports from iTunes Connect on the iPhone.


DocSets for iOS is a dedicated app for reading Apple's developer documentation on an iPad or iPhone.

It downloads the entire library (iOS and/or Mac), so that it's pretty fast and even works when you have no internet connection. It's open-source, but there's also a convenient App Store version.


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Ole Zorn
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12459 Berlin