BillBoroson's Stars
MarkPflug/Sylvan
A collection of .NET libraries, including the fastest general-purpose CSV parser for .NET.
commandlineparser/commandline
The best C# command line parser that brings standardized *nix getopt style, for .NET. Includes F# support
UpQuark/GeoNerves
.NET Library for bulk geocoding of addresses using the U.S. Census GeoLocation API