From a development management perspective....
DBGhost: Essential product which helps us to (among other things)
1) cut out all the wasted round-trip time between DBAs and developers when developers pass on bad sql, partial code (without dependencies, etc) to the DBA. Now developers should never pass anything that doesn't build properly to a DBA. The quality may still not be to a DBA's liking but that's a training issue that no tool will resolve.
2) allow the development team to have much more control over the complete product by being able to incorporate the database build into the automated code build. Now there is no excuse for the database code being out of sync with the rest of the product. The flexibility of the product means that you can easily make it a key part of the process - for too long now database development has been 'special' and handled 'outside' of the standard process
3) make database comparison and merging a simple process. We are about to embark on a major upgrade task and can be confident that DBGhost will make it much easier
SQL Prompt: Very handy SQL editing helper (although it does have some usability annoyances) which speeds up development time and ensures (if you select from the intellisence list) consistent use of upper and lower case
Missing tool: Something to help us integrate with Sourcesafe and Visual Studio (our established development tools). We are about to look into using Visual Studio database projects but will now reflect on that and look into some of the tools mentioned in your list. We want to be able to edit our code and sql from the same UI (Visual Studio) so any experienced-based help on this would be greatly appreciated. Thanks.