I’m working on compiling this right now.

http://classictechnology.herokuapp.com

Nice, wish you luck.

I've just spent a few hours searching around and I've compiled a list of what I've found so far.

My criteria are:
- Must load without HTTPS or any security requirements that old browsers cannot fulfill
- Must render properly in Netscape 3.04 / IE 3.0 or above
- Images display properly
- If there are any download links, they work and preferably are hosted locally

If any of these criteria are not fulfilled or imperfectly fulfilled then I dock points on the rating.

You can go ahead and have a look at my notes here:

Retro-compatible websites:

- http://toastytech.com
HTML 4.01 Transitional (seems to be HTML 3.2-compatible, but has PNG images
which fail to load in older browsers)
Rating: 4/5

- http://oldos.org
HTML 4.01 Transitional (formatting is reliant on CSS)
Rating: 3/5

- http://win31.de/eindex (English version - main site is in German)
HTML 3.2-ish (appears to be; no version stated. Fails validator tests)
Rating: 5/5

- http://mdgx.com/ (/0.php for "unframed" version. This site seems to crash Netscape 3.04.)
HTML 4.01 Transitional
Rating: 2/5 (points docked for crashing Netscape)

- http://oldfiles.org.uk
XHTML 1.0 Strict (seems to be HTML 3/4 compatible)
Rating: 4/5

- http://calmira.de
HTML 3.2-ish (appears to be; no version stated. Fails validator tests)
Rating: 5/5

- http://freedos.org
HTML 5 (images do not load, but formatting dumps out readably. Site loads
without HTTPS. Proper formatting is reliant on CSS)
Rating: 3/5

- http://www.vgg.com/kfc/ (Kremlin Fried Chicken - a joke page. Very funny.)
HTML 4.0 Transitional (Netscape 3.04 loads perfectly)
Rating: 5/5

- http://kleinbottle.com ("Klein bottles" - this guy makes bottles that fold in
on themselves. Very interesting.)
XHTML 1.0 (seems to be HTML 3/4 compatible)
Rating: 5/5

- http://dhmo.org ("Dihydrogen Monoxide Research Division" - joke website about
Dihydrogen Monoxide; that is, water. Hilarious. Nowhere on the
entire website can I find any admission that it is a joke.)
HTML 3.2-ish.
Rating: 5/5

http://hoary.org
XHTML 1.0 (HTML 3/4 compatible)
Rating: 5/5

http://vcfed.org (Vintage Computer Federation)
HTML 5 (formatting dumps out readably, loads without HTTPS)
Rating: 3/5

http://vintagecomputer.net
HTML 5 (formatting dumps out readably, loads without HTTPS)
Rating: 3/5

http://oldskool.org
HTML 3.2? Loads fine in Netscape 3.04. Source has Google ads in it but
they won't load - turn off Javascript
Rating: 4/5

http://classiccmp.org
XHTML 1.0 (HTML 3/4 compatible)
Rating: 5/5

http://classiccmp.org/dunfield ("Dave's Old Computers")
HTML 2.0? 3.2? Not sure. Loads fine in Netscape 3.04.
Rating: 5/5

http://bitsavers.trailing-edge.com (takes forever to load. Server issues?)
HTML 2/3-ish. Loads fine in Netscape 3.04.
Rating: 3/5 (points docked for extremely slow load times)

Vetusware (Vetusware abandonware archive)
XHTML 1.0 Transitional (HTML 3/4 compatible. Needs CSS for formatting.
Formatting dumps out readably. Login works.)

http://vogonsdrivers.com/lofi (Old browser version of main site)
HTML 2.0 (main version is HTML 5, but still loads somewhat readably)
Rating: 5/5

http://vogons.org (VOGONS forums)
XHTML 1.0 Strict (sort of HTML 3/4 compatible, needs CSS. Formatting
dumps out often somewhat confusingly. Login and posting works. Ends
up looking very ugly on anything Win95-era. Move into the late 90's
and it starts looking better)
Rating: 2/5

is it bad with the exception of the kremlin and bottle ones, I've been to all of these?