SSMSTools

This is a natty plugin in for SSMS that is totally free and has some interesting functionality including:

• Restoring the last tab group of query windows (great for reopening queries after a restart/shutdown) 
• Colour coding by server connection which may help reduce accidents
• Searching for table/view/database data
• Better Undo functionality
• Better control over snippets
• Search results in a grid
• ...lots more...