Mono Project is an Open Source implementation of the various ECMA and .NET framework technologies for Unix, Mac OS X, and Windows. The project includes a compiler, a class library, and a CLI runtime engine.
Information regarding Project Releases and Project Resources. Note that the information here is a quote from Freecode.com page, and the downloads themselves may not be hosted on OSDN.
Support for the ASP.NET AJAX APIs and controls has been added, ASP.NET can now be deployed on a multitude of servers that implement the FastCGI protocol, in addition to Apache. Windows.Forms now supports the WebControl on Windows and Linux using Mozilla. This version can now be used as an SDK for creating Silverlight 1.1 applications on all platforms.
New C# 3.0 features: variable type inference (the "var" keyword), anonymous types, array type inference, object initialization, collection initialization, and automatic properties. AOT now provides some support for 2.0 assemblies.
This is the first release where ASP.NET 2 is considered complete (with the exception of WebParts that are still missing). 1,000 new APIs have been implemented. Shared memory can now be disabled. There is a major ASP.NET performance boost, the beginning of C# 3.0, the new Mono.DataConvert class, many 2.0 Windows.Forms improvements, the start of 3.5 APIs (System.Core), COM support for Callable Wrappers, the 2.0 Socket API, and a Solaris/AMD-64 port. VB can now be used with ASP.NET.
This release fixes various important bugs and implements many of the APIs that have been identified using Moma as being important. All users are encouraged to upgrade.