Download existing and new content for ASP.NET, Office, SQL Server, Windows Azure, and other Microsoft technologies in e-book formats. Reference, guide, and step-by-step information are all available. All the e-books are free. New books will be posted as they become available.
ASP.NET Deploying an ASP.NET Web Application to a Hosting Provider using Visual Studio
Getting Started with ASP.NET 4.5 Web Forms (Beta)
Intro to ASP.NET MVC 4 with Visual Studio (Beta)
Office Configure Kerberos Authentication for SharePoint 2010 Products SQL Server Master Data Services Capacity Guidelines
Microsoft SQL Server AlwaysOn Solutions Guide for High Availability and Disaster Recovery
Microsoft SQL Server Analysis Services Multidimensional Performance and Operations Guide
QuickStart: Learn DAX Basics in 30 Minutes
SQL Server 2012 Transact-SQL DML Reference
Windows Azure Windows Azure Prescriptive Guidance
Windows Azure Service Bus Reference
This looks like the starting point for a cool resource. I'd like to see the MS Press folks get involved and get their free stuff listed here too (and with this being a wiki, they should be able to add/update/delete easily and without allot of admin fuss). It would be awesome to have a one-stop-shop for the many free Microsoft Tech ebooks...