Good Links, January 19, 2009

Tool to make sure that the feature used by a site collection is already installed: http://code.msdn.microsoft.com/WssAnalyzeFeaturesarchived (archived copy)

Completely remove a feature from a site collection: http://code.msdn.microsoft.com/WssRemoveFeatureFromarchived (archived copy) .this handles the problems when a site collection has a feature that is not installed (or is corrupt on the farm), in that case, stsadm -o deactivate will fail. This tool comes to the rescue in that case.