Automatically redirect to the content the user was most likely after, or show suggestions, instead of showing an unhelpful 404 error.
Save your visitors from unhelpful 404 errors!
Instead of quickly giving up when a visitor reaches content that doesn't exist, make an effort to guess what they were after in the first place. This plugin will perform a search of your posts, pages, tags and categories, using keywords from the requested URL. If there's a match, redirect to that content instead of showing the error. If there's more than one match, the 404 template can use some template tags to provide a list of suggestions to the visitor.
See the Smart 404 homepage for more information.