NetBpm is a platform for building, executing, and managing workflows. It is very simple to use and integrate in other .NET applications. It supports building applications which are able to turn business models into executable software models. Business analysts are able to use a model driven approach to design, implement, execute, and track business processes. So business people can easily react with business and strategy changes.
When writing anything that needs to communicate with a terminal in some way, it is almost always speaking some dialect of VT100 or ANSI. The libvt 100 library aims solely at parsing a stream of VT100/ANSI data and then letting the host application do the rendering. Many other projects also parse VT100/ANSI data, but their parser is always tangled up with the actual rendering of the data, making reuse in other projects problematic. The hope is that other projects will start using libvt100 and everyone can stop reinventing the wheel with each project.
Social ray is a platform for professional networking. Its collaboration features include friends and communities, mailboxes, instant messaging (using AJAX), a powerful search engine, document sharing, forums, vanity URLs for users, and rich media support. Its professional networking features include resume uploads, job searching, automatic job matching, testimonials, the ability to post jobs, job referrals, and accounts for recruitment consultants.
TCRun is a tool written by software engineers in QA to help in writing, managing, and running automated test cases. The current version is written in C# for use on Windows, though other versions / platforms may be created later as necessary. It tries to make writing automated test cases as simple and painless as possible. It includes support for NUnit exceptions, logging (both test case specific and framwork/runtime), parameterized tests, test case resource files, and a validation framework. It can be used in mono, but is somewhat untested (it's actually built by mono, and it tests itself).
SharpTAL compiles XML-based templates to .NET assemblies. It contains a complete implementation of the Zope Page Templates (ZPT) language, a system which can generate HTML, XML, or plain text output. ZPT is formed by the Template Attribute Language (TAL), the Expression Syntax (TALES), and the Macro Expansion Template Attribute Language (METAL).