Are there any free, or cheap plug-ins/add-ons for SQL Management Studio that provide intellisense and (less importantly) some auto-formatting? I've recently tried Redgate's product and really like it for these features, but I'm wondering if there are any alternatives.
Late answer, but might be interesting to the thread visitors
Have you heard of ApexSQL Free tools - ApexSQL Complete and ApexSQL Refactor? These might be just what you need.
ApexSQL Complete autocompletes SQL keywords, and has a ton of other SQL Server productivity features for SSMS and Visual Studio, and it is completely free.
ApexSQL Refactor is SQL formatter with over 160 formatting options - it is too completely free.
Both of these are SQL Server Management Studio and Visual Studio plugins, so you can use them directly from within SSMS and VS.