As a special thanks for all the support in the Christms Eve thread, I am rounding up and including several of anons' contributions in this separate document as well as some of my own. Not everything will be here though but a large bulk of it is. It might also be somewhat weirdly organized, so I apologize in advance.
It's not nearly as big as the main thing but nonetheless...

MERRY CHRISTMAS

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Content from the Christmas Eve thread
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Mega packs:
https://mega.nz/folder/a08zlZ5L#PlvwjFNNrfcE-wtDTsd5gQ/folder/2tVnFQjI - DeX Collection featuring mega packs of SMW, SM64, Sonic Robo Blast 2, DS games, etc.
https://mega.nz/folder/WCg1jThI#6hnlhQaNAi2ZthXWfrpKxw  - Extremely huge retro collection
https://pastebin.com/RCWPMJYx - DOOM WAD Mega Pack from /vr/ if the OG pastebin didn't fully satiate your appetite
https://www.doomworld.com/idgames/levels/doom2/Ports/0-9/100minvr - 100 min DOOM /vr/ contest entries
https://www.doomworld.com/idgames/levels/doom2/megawads/200minvr - 200 min DOOM /vr/ contest entries
https://www.doomworld.com/idgames/levels/doom2/megawads/300minvr - 300 min DOOM /vr/ contest entries
https://www.doomworld.com/idgames/levels/doom2/Ports/megawads/2048vr_v1.4g - DOOM 2048 units /vr/ contest entries
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Games:
http://supermariobroscrossover.com/resources/super-mario-bros-crossover.84/ - SMB Crossover (also available on flashpoint, which is in the previous pastebin)
https://uboachan.net/og/res/1838.html - Big thread of free indie games to cover ones I didn't grab prior
https://www.zeldaclassic.com/ - Zelda 1 for PC with support for custom content
https://gitgud.io/SHNecro/shanghaiexe - Shangai EXE, touhou MMBN game
https://mega.nz/#F!opomlYaT!fgYm4n7RMSNnBxrGQLbv7A - Shanghai EXE removed content patch
https://magmmlcontest.com/games.php - Mega Man level making contests bundled together as standalone games
https://cutstuff.net/mm8bdm/?page_id=5 - Mega Man 8-bit Deathmatch (DOOM multiplayer but Mega-Man basically)
https://www.freem.ne.jp/ - Website dedicated to free Japanese games
http://www.superfundungeonrun.com/?page_id=297 - Merry Gear Solid: Secret Santa
http://www.superfundungeonrun.com/?page_id=663 - Merry Gear Solid 2: The Ghosts of Christmas Past
https://anonfiles.com/X1337bj8pe/MM_BNGBA_SFNDS_zip - Mega Man Battle Network Wii-U w/ restored content and undubs in .gba format + Starforce
https://mega.nz/folder/ifY1XSgZ#MR0KUathP8-GwDP5a7ltEg - .cia version of MMBN
https://sonicminusworld.wordpress.com/ - Mario + Sonic crossover fan game with a ton of levels
https://nandgame.com/ - browser game about logic gates and circuits
https://archive.org/details/am2r_20190709 - Another Metroid 2 Remake (AM2R)
http://www.mediafire.com/file/zrj72u6g2mduev8/AM2RLauncher.zip/file - AM2R launcher
https://ninja-muffin24.itch.io/funkin - Friday Night Funkin'
https://www.tribesuniverse.com/ - Tribes franchise
http://nitronic-rush.com/download-game/ - Nitronic Rush
https://nifflas.ni2.se/games/ - Small directory of Knytt games among others
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Romhacks/Mods/Translations:
https://archive.org/details/ultimate-sanic-collection - Sonic Hack Collection
https://www.sonichacking.org/entries/contest2020/157 - Sonic Delta (1-3 & Knuckles in one single game)
https://sonic3air.org/ - Sonic 3 with widescreen, bug fixes, extra stuff, etc. (ignore that it claims it needs a Steam ROM)
http://www.mediafire.com/file/tb62t1miw2e5crm/Super_Mario_Bros_Frustration.zip/file - Super Mario Frustration Forever
https://www.romhacking.net/hacks/70/ - Mario Adventure - Super Mario Bros. 3 Hack
https://www.romhacking.net/hacks/2068/ - Super Mario Bros 3 Mix
http://smwdb.me/ - Super Mario World romhack database
https://www.smwcentral.net/?p=section&s=smwhacks&u=0&f[tags]=collaboration - Super Mario World level design collaborations including contests
http://longc.at/vhacks - Super Mario /v/orld 1 and 2
Super Mario 64 Land - Linear Mario 64 Hack with custom enemies/powerups - https://mega.nz/#!DQFCFKxL!sVxeh2mmTxb6brZptoroq_fdUCKZHiO1SW_YgrG2CrA
https://www.mediafire.com/file/yac0rzau01aacvu/Super+Mario+and+the+Cursed+Castles+v1.02.zip - Super Mario and the Cursed Castles 
https://cdromance.com/gba-roms/megaman-battle-network-6-cybeast-gregar-english-patched-gba-rom/ - MMBN Cybeast Gregar patched
https://www.therockmanexezone.com/general/2019/10/26/mega-man-battle-network-4-5-real-operation-english-translation/ - Battle Network 4.5 Real Operation English Translated
https://projectplusgame.com/download/ - Project M Plus
http://forums.kc-mm.com/Gallery/BrawlView.php?Number=217920 - Project M EX
http://forums.kc-mm.com/Gallery/BrawlView.php?Number=219069 - Melee Styled mod for Brawl
https://drive.google.com/drive/folders/1tJH4K1fwGUC1Gcnhx6bSFAcm20hsYnWe - Project M with a ton of stages
https://www.hazmatt.net/gaming/starcraft/index.html - Starcraft mods
https://github.com/LagoLunatic/wwrando - Wind Waker Randomizer
https://www.romhacking.net/hacks/5334/ - The Legend of Zelda: The Missing Link
https://hylianmodding.com/?p=2116 - Zelda: Master of Time
https://github.com/Brotenko/PMMasterQuest - Paper Mario Master Quest
Some people said I missed Newer Super Mario Bros DS and Wii, they were in the OG pastebin but they're under a single link to the team's website. I will post it again so you don't have to look again: 
https://newerteam.com/
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Sonic Adventure DX definitive mods which has its own section since the anon linked a whole bunch:
http://info.sonicretro.org/SADX_Mod_Loader (you need this first)
https://www.moddb.com/mods/sadx-dreamcast-conversion
https://github.com/michael-fadely/sadx-dc-lighting/
https://www.moddb.com/mods/sadx-dreamcast-conversion/news/dreamcast-exclusive-dlcs-now-playable-in-sadx-pc
https://github.com/PiKeyAr/sadx-sound-overhaul
https://github.com/ItsEasyActually/SA1_Chars
https://github.com/PiKeyAr/sadx-dreamcast-dlc
https://github.com/PiKeyAr/sadx-hd-gui/commits/master
https://github.com/PiKeyAr/sadx-sound-overhaul
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Misc:
https://hiddenpalace.org/Prototypes - Huge list of prototypes archived and downloadable.
https://hiddenpalace.org/Category:Unreleased_game_prototypes - Same as above but unreleased games only
https://www.goodsites.tech/ - shitloads of useful links from /g/
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NEW STUFF
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Games:
https://mega.nz/#!RUIhAYgb!3zaMbIkkIuQJDAZ2W0fTSkmALaXx9T-4PD-whKp26A4 - Metal Gear Solid Integral (PC) (Might require a copy of the game???)
https://www.mediafire.com/file/bsi31ugc2d2c87h/pt.zip/file - PT for PC (untested)
https://steamcommunity.com/discussions/forum/7/215439774869100392/ - A list of every Source Game created
https://github.com/edo9300/edopro - Play Yu-Gi-Oh with others
https://digimon.fandom.com/wiki/Fan:Fan-games - Digimon Fan Games
http://www.mediafire.com/download/9f481196v0226n6 - Diner Dash
http://www.mediafire.com/file/0s7s5nswoa7xgsk/Diner_Dash_2_%255BFull_Version%255D.exe/file - Diner Dash 2
http://www.mediafire.com/file/vtsjxccwhfie96z/Plants_vs_Zombies.exe/file - Plants vs Zombies
a.pomf.cat/nrudth.rar - Townscaper (provided by the developer)
https://archive.org/details/zx_spectrum_library_games - ZX Spectrum games
https://www.myabandonware.com/ - A website dedicated to downloadable abandonware, games that were "abandoned" by their developers
https://archive.org/details/classicpcgames - Classic PC game demos collection (some full games too)
https://drive.google.com/file/d/10HL9C-Ftce3wRfLyMwB00qb6D1R5zsyv/view - Sonic 06 Fan Port/Remaster for PC
http://www.mediafire.com/file/9y8zc3yz7ry3xt3/Donkey_Kong_Country_4_The_Kongs_Return_-_Demo_v0.3.rar/file - Donkey Kong Country 4: The Kongs Return
http://projectdiva-hd.blogspot.com/2013/12/new-project-diva-v3.html - Unofficial Project Diva for PC + Songs
https://mega.nz/file/m7oGwaoa#gkAOxbzo7gxUYiedsF1JoW1qYN2JN5yyNA6f_cBPo_g - Texas Hold'em Poker 3D Deluxe Edition
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Romhacks, Translations and Netplay:
https://txti.es/mario-party-netplay-64/images - Mario Party 1-3 Netplay guide
https://txti.es/mario-party-netplay-gcn/images - Mario Party 4-7 Netplay guide
https://txti.es/mario-party-netplay-wii/images - Mario Party 8/9 Netplay guide
https://www.mariopartylegacy.com/forum/index.php?action=downloads - Mario Party custom boards, event scripts and music
http://n64vault.com/wiki:ge-custom-campaigns-visual-list - Goldeneye Custom Campaigns
http://n64vault.com/wiki:pd-solo-levels-visual-list - Perfect Dark Custom levels
https://mega.nz/file/VZkXxDYT#UriSCkJO9PdYIa8dgYaY-PNSapjZlvMVaAx579BDP9Q - Scrooge 64 (SM64 Christmas Romhack)
https://www.romhacking.net/hacks/1505/ - Kirby in SM64
https://www.smwcentral.net/?p=section&a=details&id=25245 - Captain Falcon in SM64
https://www.smwcentral.net/?p=section&a=details&id=24852 - Sonic in SM64 
https://www.romhacking.net/hacks/5618/ - Mario Kart 64: Battle Kart 64
http://n64vault.com/ssb-levels:btt-snooplax - Smash 64 Break the Targets Challenge
http://www.romhacking.net/hacks/5101/ - Super Sonic Bros (Smash 64)
http://www.romhacking.net/hacks/5534/ - Super Sonic 2 Bros (Smash 64)
http://www.dkc-atlas.com/forum/viewforum.php?f=33 - Donkey Kong Country Trilogy romhacks
https://www.zettagames.net/rooms/ps2/iso-mods/ - Other DBZ Budokai Tenkaichi 3 hacks (PS2, Spanish)
https://www.romhacking.net/reviews/2199/ - Final Fantasy VII Platinum
https://www.sonichacking.org/entries/contest2020/207 - Mean Bean Machine DX Edition
https://www.sonichacking.org/entries/contest2020/305 - Gex in Sonic 1
https://www.mediafire.com/file/jk8lf5s4lfvkb88/Projeto_Crossover.rar/file - DBZ Budokai Tenkaichi 3 Crossover (PS2, Spanish)
http://xkeeper.net/private/pacman/ - Donkey Kong Original Edition (NES, adds missing level) (just download the .nes)
https://anonfiles.com/t1Rctd2ep5/OoTR_357866_1ARS8HRSB8_z64 - clusterfuck OOT randomizer seed of mine (no idea how long this link will stay up however, also you might need cheats to get anything done)
https://files.catbox.moe/18erhs.png - Screenshot from randomizer seed above (though it does spoil the surprise)
https://drive.google.com/file/d/1Jnkb6GVMZlZhnmecUYmVqcyHhBeb_8Pc/view - Mario Kart 64 San Andreas Mod
https://forums.dolphin-emu.org/Thread-paper-mario-ttyd-hd-texture-pack-v1-9-april-1st-2020 - Paper Mario TTYD HD texture pack
https://www.romhacking.net/?page=hacks&genre=&platform=&game=788&category=&perpage=20&order=&dir=&title=&author=&hacksearch=Go - Metroid: Zero Mission romhacks
https://www.romhacking.net/translations/3243/ - Tengai Makyou Zero translation
https://www.romhacking.net/translations/730/ - Castlevania III JP version re-translated
https://www.romhacking.net/translations/5829/ - Wizardry Scenario 1 translation
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Mods:
http://sm64pc.info/forum/viewtopic.php?f=4&t=101 - Sonic in SM64 (PC)
https://shrekboards.proboards.com/thread/39/shrek-super-slam-tournament-edition - Shrek Super Slam Tournament Edition
https://mega.nz/file/3qJ2XSbJ#LFMw0B2xW7LsivSB8O4_DCNtyZ8fz0DAAWatp4OeJ30 - BallisticNG track pack
https://worms2d.info/WormKit - Modules for Worms Armageddon
https://mega.nz/folder/OE8jmCjb#msO1qOER-GhVEmlksrYvgQ - Worms Armageddon mod collection
http://dustmod.com/#installation - Dust Force mod
https://openfortress.fun/ - Open Source TF2 (WIP)
https://chao-island.com/downloads/ - Resource for modding Chao Garden in the Sonic Adventure games
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Misc:
https://search.stepmaniaonline.net/packs/a - Stepmania song packs
https://www.youtube.com/watch?v=Seou4ZiUXEE&feature=youtu.be - (Ongoing project) OG Xbox Live server revival
https://www.youtube.com/playlist?list=PLEvGfPRiBfYKParGLjVPE7FldJTIl2lFv - Nintendo Promotional VHS tapes (skip the intros)
https://archive.org/details/videogameprev - A bunch of video game previews
https://archive.org/details/manuals - An assortment of manuals ranging from military, television, appliances arcade/video games, etc.
https://hiddenpalace.org/Sonic_the_Hedgehog_3_(Nov_3,_1993_prototype) - Particularly interesting Sonic 3 prototype
https://www.heroforge.com/ - Create custom miniatures for TRPGs
http://www.mediafire.com/file/5hdtwqx2zjg2ibh/WipEout_-_The_Complete_Discography_v1.0.rar/file - Wipeout OST
https://www.youtube.com/playlist?list=PLKNuUcvZGX21obTJzXuVHUWRcS2cCBBsP - Donkey Kong Country 1 OST restored to studio quality
https://www.youtube.com/playlist?list=PLKNuUcvZGX23N53oLt93q4CZRj8m-Il_- - Donkey Kong Country 2 OST restored to studio quality
https://www.youtube.com/playlist?list=PLKNuUcvZGX23vL8Jsv9uO8KCUKqhKQgwQ - Donkey Kong Country 3 OST restored to studio quality
download.kalypsomedia.com/dungeons3/Soundtrack.zip - Dungeons 3 Soundtrack being given for free by the devs (temporary? idk)
https://i.imgur.com/ASIm9NQ.jpg - Where's LowTierGod? Can you find LowTierGod?
https://bouncingdvdlogo.com/