With my experience of Indian software industry and education system, this is the single-most reason that resulted in deficiencies of Aadhar implementation.
You missed http://tagz.in . Yes, Tagz is a bookmarking site, but it also gives a short URL. I had suggested the developer to add the Short URL facility to all pages, but is unfortunately available only on the user's own saved page. If enough people ask, the developer might give the facikity for all links.