@platypus @ashley @joshuatj If you're looking for registries, WikiDP might be the thing you're looking for. http://wikidp.org/ It's working to wrangle file and software data in WikiData.
Another potential could be the software records in PRONOM, but I have not worked with those much at all. http://www.nationalarchives.gov.uk/PRONOM/Software/proSoftwareSearch.aspx?status=new
If you're looking for registries specifically of digital library tools like DROID, .... .... maybe coptr? Not a controlled vocab, but it is a registry http://coptr.digipres.org/Category:Tools
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