Few Resources I find useful...

http://directshownet.sourceforge.net/
Summary: (from link)

DirectShowNET Library

The purpose of this library is to allow access to Microsoft's DirectShow functionality from within .NET applications. This library supports both Visual Basic .NET and C#, and theoretically, should work with any .NET language.

NLog: - nlog-project.org

NLog is a free logging platform for .NET, Silverlight and Windows Phone with rich log routing and management capabilities.

SharpBox - Store everything

https://sharpbox.codeplex.com/

skydrivesync

https://bitbucket.org/mattrwhite/skydrivesync

Ionic.Zip

http://dotnetzip.codeplex.com/

a library for handling zip archives. http://www.codeplex.com/DotNetZip (Flavor=Retail)

SharpMap

https://sharpmap.codeplex.com/

SharpMap is an easy-to-use mapping library for use in web and desktop applications. 

DotSpatial.Projections

http://dotspatial.codeplex.com/

The DotSpatial.Projections library is a port of the popular proj4 c++ library to C# .Net. 

NetTopologySuite

https://code.google.com/p/nettopologysuite/

A .NET library for GIS operations, direct porting of JTS Topology Suite 1.10 library

Google.GData

https://developers.google.com/gdata/

BruTile

http://brutile.codeplex.com/

BruTile is a C# open source library to access tile services like OpenStreetMap and Bing. BruTile has few dependencies, is platform independent and has a limited scope. It is intended for reuse by other more sophisticated libraries

CheckBoxComboBox
http://www.codeproject.com/Articles/21085/CheckBox-ComboBox-Extending-the-ComboBox-Class-and