Microsoft SQL Server home page
SQL Server - Documentation centre
About Sql Server - Database design and development
Disk Partition Alignment Best Practices (SQL 2012 / 2014)
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Professional SQL Server 2008 Internals and Troubleshooting by Christian Bolton, Brent Ozar et al
in-depth coverage of best practices based on a deep understanding of the internals of both SQL Server and the Windows operating system.
Professional SQL Server 2012 Internals and Troubleshooting by Christian Bolton, Justin Langford et al
Quickly become familiar with the changes of this new release so that you can best handle database performance and troubleshooting.
Kalen Delaney MVP
Practical, hands-on guidance for SQL Server with numerous code samples, table examples, practical advice, and best practices.
Inside Microsoft SQL Server 2005: The Storage Engine by Kalen Delaney MVP
Inside Microsoft SQL Server 2005: Query Tuning and Optimization by Kalen Delaney MVP
Inside Microsoft SQL Server 2008: Internals by Kalen Delaney MVP
Beginning Transact-SQL With SQL Server 2005 by Paul Turley et al
Optimize query performance, use views and stored procedures, manage multiple databases.
SQL Cookbook by Anthony Molinaro
Each recipe demonstrates how to accomplish a given task. Perfect for quick example code to 'make it do the right thing'.
SQL Express Edition
DBA Tools - PowerShell tools to Automate Instance to Instance Migration.
Command Line Utilities 14 for SQL Server Including SQLCMD and BCP
Microsoft Log Parser 2.2 - Tool to run SQL queries against a variety of log files, export to SQL table or CSV.
Instant SQL formatter - Online code tidy, upper/lower case etc.
SS64 discussion forum
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"we'll ship it when it is ready" ~ Paul Flessner (Microsoft VP databases)