JustMock is an easy, fast, feature rich framework for creating unit tests. This complete mocking tool allows for mocking of non-virtual methods, non-public members, sealed classes and static methods and classes - all within one simple API.

JustDecompile is available for free download individually, or it can be purchased with priority support as a part of DevCraft - the most comprehensive HTML5 and .NET toolbox. JustDecompile is fast. In fact, really fast. When tested against the leading competitors, for .NET framework decompilation time, JustDecompile came out 10 times faster than the leading commercial decompiler. Try it and verify the results for yourself.

Use OCR.NET component to retrieve text from image, for example from scanned paper document.
uses Tesseract OCR engine and Leptonica image processing library
available for .NET 2 - 4.7
source code included in registered version
royalty free distribution in applications

Xamarin Forms is great if you want to develop apps for different mobile platforms. But when it comes to touch gestures, it is still very limited.
For more than a year they only had the TapGestureRecognizer. Although they did add some others lately, they still don't provide all information which you need. Furthermore the API which they use has been copied from iOS and is not what a .NET developer would expect.