I am not promoting this, but their website has that 90s feel.
https://www.heavensgate.com/

It's always interesting to see that their are still some sites from the "oldnet" era, that are still hanging in there. I'm sure there are more.

I've got a few to share but admittedly I don't organize or date my bookmarks very well.

Okay first one. Kinda cheating since this one went down, but one of the sites that sticks in my mind is Becky's Place, simply because of the lore behind it and how out-of-the-blue discovering it was. I found it on accident while looking for sites to pull Wolf GIFs from for use in a Worldsplayer world, this was a 'friends' link on another page. The site was sitting dormant for a decade until the shutdown of Geocities US because of a domestic murder case, which there are media reports of. My first thoughts when finding all of this were, does this person know that the thing she made however many years ago is still around? What would it be like to be ripped away from society for nearly two decades during humanity's most rapid period of innovation, to find that the .com thing for nerds became the center of everything? That's gotta be insane

On a more lighthearted note, here's a page about Microsoft Comic Chat.

The classic "IE is Evil" There's plenty more stuff on ToastyTech but this is probably the most well known section.

Really cool personal site belonging to a US vet and furry fan. This one is really a maze with how much rambling there is to read :)

And in line with my interests in retro computing, some Amiga stuff:
A site belonging to tech enthusiast PJ Hutchison. Has a really nice AmigaOS programming guide that I've found very handy.
And here's some old demoscene docs from the AGA days for any M68k assembly programmers. You can find a few points in the pages within that imply Commodore would still be around, heh.
Some other cool stuff: http://zakalwe.fi/~shd/ https://www.lysator.liu.se/~marcus/amiwm.html

Becky's Place is exactly what I mean in the introduce yourself thread when I said, "Also feel like the era of the internet when people had personal websites hosted by their ISP, GeoCities, Angelfire and etc. had a more original and personable aspect."

One I remember from my Onlive! Traveler days, that is still alive:
SmilingCat

A site that started in the "oldnet" days, has grown/changed, but still has that feel:
Stuart Conner's Home Page
- Well maybe a couple years after "oldnet", since it was around 2001.
- I visit it for TI-99/4A information.

Not "oldnet", but this is a site that I stumbled on:
Welcome To Firealarms!
- Even though the site was made in 2019, it has that "oldnet" feel to it. Almost like a nod to the era. Including being under construction and the 90s style graphics.