Atom.NET is a C# library designed to handle Atom
feeds in a handy way. It provides an object model
to write and parse Atom feeds. It's compatible
only with the 0.3 Atom draft specification.
PsyncCE is an offline PDA/MDA client for
PHProjekt. It supports synchronization of
appointments, contacts, and tasks and allows
offline collection of timecard entries. It
synchronizes directly over the Internet using the
PHProjekt SOAP backend.
CMS loa2003 is an attempt to produce a cross-platform CMS using C# and SSCLI on Windows .NET and Mono. It provides an object database, security features, and much more.