It is available at http://delicious.isnotworking.com/
If you're like me, you probably have thousands of bookmarks collected over years and years of web surfing and hundreds of tags used to describe them. But the thing is that over these months/years you haven't been able to come up with a consistent taxonomy for your tags.
I have, for example, dozens of different tags for expressing links related to software development: "dev", "devel", "development" etc.
So this tool can suggest you tags to be merged together, so you can choose one by one and have this tool to merge the chosen tags on your delicious account.
Examples of suggested merges: “book”, “books” and “ebooks” tags into a single “books” tag. “devel” and “development” into only “dev” etc.Try it and leave some feedback here!