TL:DR; 100% managed version of ZLIB compression library.
100% managed version of ZLIB compression library. Full C# source code is included.
TeeChart Charting Controls for Xamarin.Forms offer the most common chart types, gauges and maps with customizable tools for data visualisation in mobile applications.
Aspose.Flash is a non-graphical, .NET Flash® management component. It provides support for; Creation, Parsing and Modifying existing Flash files, Adding sounds, Controls buttons and Inserting video streams, Shapes, Images and Lines to the Flash files
NOV Gauge for .NET has extensive support for instrumentation widgets such as radial (circular) and linear gauges, knobs, indicators and numeric displays.