A database of URL shortening services
I found myself with a need for a list of URL shortening services but I couldn't find a good one. Where I define "good" as "available in a sensible format and kept up-to-date".
So I've started my own.
You can query it via DNS (but it's not a DNSBL/RHSBL, as the return value needs parsing).
It is used like this:
$ dig +short txt bit.ly.type.spam.ms
"r\;p"
Where r means "redirect service" and p means "public" with a semicolon as the separator.
See the FAQ for more information. Let me know if it misses any URL shorteners (eventually I'll add a submission form, but I just wanted something that worked to start with).