They have a great post on Mobile Ink for Compact Framework (http://blog.opennetcf.org/marteaga/PermaLink,guid,96f16e00-4881-45bb-9a80-424229ee4ad0.aspx).  I didn’t know you could do Inking on CF like you can on Tablet Pcs?  They have also done all the leg work to determine the version of the Compact Framework (http://blog.opennetcf.com/ncowburn/2007/08/22/HOWTODeterminingTheNETCompactFrameworkVersion.aspx).  They have a lot of code in there possession and it interested me that they opened up metrics about their Code Metrics (http://blog.opennetcf.org/ncowburn/2007/06/07/SmartDeviceFrameworkCodeMetrics.aspx).

As if this was not enough, they have even created a web server for CE (http://www.opennetcf.com/Products/Padarn/tabid/267/Default.aspx) that I assume is written in CF!