As a learner I have got chance to know lots of free and precious SQL Server resources in last few months.
Like to share this list with friends in our community. Let me share my second list later (as I wanted to keep this list short).
Unknown is an ocean. If you think I have missed an important FREE learning resource, please forgive my innocence and share it in comments section.
and few more important links which We should not miss
MCM Readiness Videos - http://technet.microsoft.com/en-us/sqlserver/ff977043
MCM Pre-Reading List - http://www.sqlskills.com/mcm.asp
Technet Magazines - http://technet.microsoft.com/en-us/magazine/bb978517.aspx
Microsoft Webcasts/VirtualLabs - http://events.microsoft.com
And the above list reflects my focus area in SQL Server and not necessarily suit for all SQL Server professionals.
For example this list may vary for SQL/BI developers.