Indexing URLs #general


I have noticed over the months I've read this blog that contributors have mentioned a great many sites that offer particular kinds of data.  It seems to me that it would be really helpful to collect these sites and index them for what they contain and the country/region/locale they cover so researchers could consult the list for their needs.
By any chance has someone been compiling such a list, and if so, where can people find it?
Yale Zussman

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