BOAPI is an implementation of default often used business objects in different programming languages with an identical public interface. It supports PHP 5.3 (with namespaces), C# (.NET port), and Java.
Byldan is a framework for managing the build
lifecycle of .NET applications. Its goal is to
support multiple platforms (Linux/Windows) and
multiple compiler vendors (Novell/Microsoft).
MonoStack is a distribution of Apache, mod_mono,
and XSP that hooks up to your existing Mono
installation and allows you to easily get ASP.NET
up and running in your Linux distribution.
Aspect# is an AOP (Aspect Oriented Programming) framework for .NET. It
uses Dynamic Proxies and XML configuration files as its basis and is
compliant with AopAlliance.