Composite is a free and open source content management system based on the Microsoft .NET 4 platform.

It has all the standard features that can be expected from a CMS and has much more like a SEO assistant or built-in image editor.

The application can be controlled by users from every level as it is possible to set a different "publication workflow" for different user roles.

The CMS is pretty careful on creating W3C-compliant web-pages as there is a XHTML validation-when-editing feature included.

For a faster usage, it is possible to edit pages while browsing them.

As a last handy feature, Composite supports creating multilanguage websites and helps you focus on the content rather than the layout during that process.

Search Engine Optimization (SEO) Toolkit is a free tool from Microsoft for improving a website’s relevance in search results.

It simply analyzes a website & recommends how to make your new or existing site content/structure more search engine-friendly.

Some features of SEO Toolkit:

• full-featured crawler engine
• query builder interface that allows you to build custom reports
• display of detailed information for each UR
• ability to manage robots.txt file
• ability to manage sitemap.xml file

It requires an IIS7 enabled computer to run which is basically Vista, Windows 7 or Server 2008. After that it can analyze any local or remote website.

P.S. Besides standard installation, SEO Toolkit can be installed easily using the Microsoft Web Platform.

The Web Platform Installer Beta (Web PI), makes it easier to create a web development environment on your PC.

It provides a single, free package for installing and configuring Microsoft’s entire Web Platform, including:

• IIS7
• Visual Web Developer 2008 Express Edition
• SQL Server 2008 Express Edition
• .NET Framework.

You can mention whether you’re an ASP.Net developer or even choose support for specific features like ASP, SQL Server driver for PHP, etc. besides installing the complete Microsoft Web Platform

Considering the IIS version to be installed is IIS7, the installer is compatible with Vista & Microsoft Server 2008.