Arborium is a versatile, tree-based data structure to store or exchange data and metadata efficiently (in binary format). Written in pure C#, can be used in F#, too.
CacheManager is an open source caching framework for .NET written in C# and is available via NuGet. It supports various cache providers and implements many advanced features.
Simple, reliable feature toggles in .NET
Graph Engine = RAM Store + Computation Engine + Graph Model
.Net下的开源GIS框架，从 JTS 移植过来。
DotSpatial is a geographic information system library written for .NET 4. It allows developers to incorporate spatial data, analysis and mapping functionality into their applications or to contribute GIS extensions to the community.
License: Apache License, Version 2.0