Thinking about it, as and when people are building huge and ambitious computers here, and wondering about browsers, one of the obstacles is that the whole encryption thing is quite complex. So having access to an http-only web would be handy. But there's not a great deal of that - it's a pity wiby (linked above) only offers an https version. Likewise, textise.net is quite handy for turning modern sites into text, but it's https-only.
Here are a couple of sites I found - would be interested to hear of others, especially if there's an http-only search engine. Or a big curated directory, as we briefly had before search engines.
http://retro.hackaday.com/http://textfiles.com/