bridges to other worlds

Sounds Resource - A library for video game sound effects. (also check out Spriters Resource)
Emulation Game Wiki - Wiki + general resource for emulation. A lot of useful things can be found here.
SauceNAO - Reverse image searching tool, intended to be used for art.
Pixelart Converter - Pixellizes an image of your choice.
Favorite Pokemon Picker - A tool for compiling a list of your favorite pokemon. Here's mine! Lyra's list
Ublock Origin - Adblocker for Firefox. Essential for going anywhere in the web.
Enhancer for Youtube - Browser extension that improves YouTube functionality, by adding loop options, volume boosts, video speed options, etc.
NIPPER Maps - Nipper's Gamebanana page (his website seemingly doesn't exist anymore).
BetterSAM - A tool that allows making downloadable voiceclips of the old Software Automatic Mouth TTS.
XLATOR - A remake of paulschou's original "TRANSLATOR, BINARY" page.
TF FileFactory - An archive of old QuakeFortress/TFC maps.
cobalt - A tool for downloading media more easily, in a similar vein to youtube-dl.
youtube-dlp - Speaking of... a fork of youtube-dl with fancy stuff on top.
OBS Videocall Streaming Tutorial - Because searching for "obs discord streaming with audio" doesn't fucking lead to this page, for some reason.
gnuThumbnailer - A tool for making thumbnails by the batches. It looks ancient, it does exactly what it needs to without bullshit. It's how I ensured the gallery page didn't require 5 minutes of downloading to fully appear.
xnView - The above refuses to work properly on Deck so I found this instead. General purpose image viewer/editor with batch processing.
Vesktop - Discord alternate client, designed around Linux but available on all platforms. I use this on my Steam Deck - streaming actually works properly on it.

Metalheart / early 2000s wallpapers
Picture of hot dog - It's a hot dog.
crouton.net - It's a crouton.
DESKTOPGENERATION - Art collective that makes more metalheart / similar art.
noisivy - Y2K-like art
Shake Art - Make your own Vib-Ribbon style drawings.
Official Xbox Magazine - Repository for both the US and EU versions of the OXM.
Driving off the Map - An in-depth analysis of Metal Gear Solid 2.
Let's Break Pokemon Blue - A deep exploration in how much you can break Pokemon Blue before it kneels. The answer is "a whole fucking lot".
SUPER MEGA COMICS - My instincts tell me life shouldn't be so horrible.
Sinkdog Archive - An archive for sinkdog art.
Osamu Sato Archive - An archive that holds most of Osamu Sato's work.
Portal 2 ARG SPUF Thread - An archived page of the thread used to compile information on the Portal 2 Potato Sack ARG, back when the Steam User Forums still existed. Most, if not all the links are unfortunately dead, so the images are potentially lost forever. A damn shame, because they make most of this thread.
pouet - Demoscene archive.

otogomez - A collection of strange RPG maker games. They may need a bit of tinkering to make them work.
Cicada Marionette - CryptWorlds creator's personal website. There's quite a bit to see here.
The Obscuritory - A blog that talks about lesser known games.
CLASSIC GAME - RPG Maker 2000 game. Classic game.
Modlink - A resource for Uplink mods. Hasn't been updated since 2005, but, uh, it's still up, so...
Onlink - A rather large mod for Uplink, with a bunch of new content. Has seen very very little activity nowadays. The most recent version I can find is here.
Weird Fucking Games - Self-explanatory.
MyAbandonware - Archive for old, forgotten games. You've probably never seen 80% of this shit. Just be mindful downloading some of these - if a download looks sketchy, try looking for alternatives.
Need for Speed Abandonware Downloads - EA clearly doesn't give a shit about the older NFS games anymore. So here's a resource for most, if not all, the ones that are unavailable anywhere. (Literally; the purchase buttons on Steam are gone.)
Metroid Planets - A fangame based on NES Metroid, including many quality-of-life additions, smoother animations, randomizer modes, custom room packs, and co-op (!!!)

DAN-BALL - Collection of webtoys. A lot of classics here.
Simon Tatham's Puzzles - A collection of puzzles, played in the browser or downloadable. Available as a mobile app as well. Has kept me company for many years.
Your World of Text - Multiplayer notepad, editable by anyone. As one might expect, it's anarchy in there.
Explorable Explanations - Interactive experiences designed to better explain some concepts. Very educational.
galaxy - A website that hosts incremental/idle games of all sorts. Useful if you need to black hole a few hours of your time.
Project Brick - Archive of Lego-related games and media.
Noclip - Explore a wide variety of video game maps... in your browser!
Yume Nikki Online - Play Yume Nikki and a bunch of fangames... in your browser!
Notpron - An old one. A (technically) browser-based game that involves finding an username & password to access the next page. Puzzle difficulty ranges from simply looking at the source code, to tinkering with audio files and color channels within images, to, at one point, straight up having to do remote viewing/astral projection... well, at one point, at least. They removed that.
Sudoku - Regular sudoku is boring. Try these instead, with extra rules on top: 1, 2, 3, 4 (difficult), and more from this channel

webcomics, stories, animations, etc.

RubyQuest - Interactive story that started, and finished, on /tg/. Formative. A young woman wakes up in a facility, with no memory of how, where, or who she is. Preserved in Flash format, with extras.
Roommates - Long written story, based on the FNaF series. Formative. A lone human tries to get by in a world full of animal people.
NanQuest - Interactive story that has been finished. Spiritual successor to RubyQuest. A repairwoman is tasked with fixing electrical issues at a hotel. Things don't go as planned. Preserved in Flash format.
Please Say Something - Animation by David O'Reilly. A strained relationship between a cat and a mouse.
The External World - Animation by David O'Reilly. Snapshots of unhinged, chaotic lives.
Fuelled - A revenge story.
Dream's End Come True - Four hours until shutdown. V2 finds one last moment of peace before the end.

funnies

Some (most?) of these are not everyone's cup of tea. General warning for *extremely* foul language for the griefing ones especially, and loud noise.

Screaming Starcraft Guy - YouTube playlist. The most normal streamer in the world. Prepare your eardrums.
What is your password? - What it feels like trying to log in to anything nowadays.
YAY YAY - Deranged shitpost of a video. The nature of its discovery, and its meaning, eludes me.
celluloid 3000 - Completely normal Counter-Strike footage. There is absolutely nothing wrong with this video. Everything is fine.
DNSL & 1DNSL & 2DNSL - Settle down, ok?
italia - italia
Bacon - Bethesda games are extremely well-made. This channel is dedicated to showcasing just how true that is.
ClassicsOfGame - Classics of game. No explanation needed.
2ndJerma - This man could make watching paint dry a 2-hour meme fest. People would start calling him "paint watcher andy" or some shit.
Let's Game it Out - Sandbox, survival, crafting, simulator - these are the kinds of games Josh plays the most. And he is terrifyingly good at breaking them. I'm convinced he doesn't know any other way to play these.
hey - hey
wayneradiotv - The HLVRAI guy. The link leads to his Fallout 4 playthrough.
ymfah - Informative guides (?) on how to beat Soulslikes and Bethesda games with special self-imposed challenges.... like not being able to walk. Or talk to NPCs. Or use weapons. Or attack.
sushiramenriku - A guy with too much money and free time spends it all on the most ridiculous experiments possible.
PilotRedSun - Not so state of the art then, is it?
火車 - The day this video gets taken down is the day we're all officially doomed.
How to turn a sphere outside in - Self-explanatory.
chleb - Bread.
in the big leap we trust - My favorite 2004 video
im hitting my dmt cart right now - A CS:GO player witnesses the deepest machinations of the universe and reality itself mid-match.
miranda - she's one of the BOOOOOOOOOOOOYS
uh oh! you got the virus! - Always sanitize daily!
webdriver torso left me broken - No comment.
let me check the body - Average TTT moment
Parents Suck - FUCK you mom
AAAAAAAAAAAAAAAAAAAAAAAAAA - Found on the tape.
SUPER LOUD BOY - Actually turn your volume down for this one. No, seriously.
american - World's strongest D-Class styles on the entire Foundation

spookey

Hitogata - Video about an unsettling Japanese PSA that might not even exist.
Mathrus - An exploration into the "Mathrus" urban legend, a MUGEN character that was supposedly so strong, not only did it completely destroy computers upon starting a match, but also supposedly knocked out the author's local power grid, once.
INTERLOPER - Unusual console commands are discovered in Half-Life 2 that randomly generate demos. An investigation is started into what these demos are, and very quickly, everything we know about the Source engine is thrown into question. (it's not real but it would be awesome if it was)
Basilisk - An analysis on two unfiction horror games, Basilisk and Basilisk 2000, made by the developer of Lunacid and Lost in Vivo.
This House Has People In It - 12 minutes of camera footage of people in a house. We have, indeed, confirmed that there are people in this house.
AlphaVer - Analysis on a (fictional) Minecraft version - Minecraft Lilypad - that supposedly was never released to the public and diverges slowly into something that can barely be recognized as Minecraft anymore.
adverserot - A highly obscure and apparently defunct Doom unfiction series/ARG. These are my own uploads of whatever videos were available through Internet Archive.

will.ninja - A collection of webtoys playable in-browser
InvisibleUp - Has a lot of highly interesting articles