Microsoft offers OneNote, Visual Studio Community and Photosynth for free as of 2015. Whereas OneNote is available for Windows, Mac OS X, iOS and Android, Visual Studio Community and Photosynth are only available for Windows.
OneNote is an advanced note-taking application that can sync notes across different platforms. It allows the user to clip Web content, snap photos and work together on a single document. OneNote supports both key and touch input as well as styluses. The application comes pre-installed as a part of Windows 10 but is also available for older versions.
Photosynth is a 3-D image application that can create and view panoramas and synths. Microsoft describes a synth as a collection of photographs that match perfectly when tiled. Photosynth automatically tiles pictures taken around an object to create 3-D images that the user can rotate and zoom into. Alternatively, the application can also create 360-degree panoramas that connect seamlessly on the edges.