This webpage has links to amazing Scratch projects at http://scratch.mit.edu, a website with a programming language called Scratch you can easily make programs with by dragging and dropping blocks that represent code.
Custom block packs
Custom Block Megapack (by Zro716) - The code of at least some of the custom blocks in that Scratch project might have certain functions you might have never thought were possible in Scratch because you might have thought they were too complex to be able to be implemented into Scratch.
Ultimate Custom Block Pack (by ProdigyZeta7) - This time, there's more simple custom blocks in the Scratch project. If you're looking to implement any simple functions into any of your Scratch projects and can't program them into any of your Scratch projects yourself, you might find custom blocks to cater for at least some of your Scratch project making needs.
Emulators
KChip-8 (by childishbeat (that's me!), but remixed from the original creator of KChip-8 - A-KouZ1) - An easy-to-use CHIP-8 emulator with many built-in CHIP-8 and SuperChip-8 programs.
Full motion video
Bad Apple (by childishbeat (that's me!), but remixed from comp09, who remixed it from novice27b) - This song has a black and white music video, and the whole video, along with its audio, has been ported to Scratch amazingly well.
Johnny Quasar (Jimmy Neutron prototype) (by childishbeat (that's me!)) - The first Scratch project mentioned on this page in the full motion video section I made myself without it being a remix.
Маша плюс каша (17 Серия) (by tombunyon) - The audio and video of this Scratch project are of a lower quality than the other examples of full motion video in this category, but it's still interesting to see the whole video, which is just under 7 minutes, making it longer than the other examples of full motion video on Scratch mentioned on this webpage, as a Scratch project.
Raining Tacos - Parry Gripp & BooneBum (by tombunyon) - It doesn't have as much of a high frame rate as the original video, but in my opinion, it's still interesting to watch in Scratch because it's full motion video.
Shawn Mendes - Stitches (Scratch Video) (by tombunyon) - The video runs at 10 frames per second at a 320x180 resolution, but the Notes and Credits of the Scratch project claims Scratch made the video run at a 160x90 resolution for some reason.
The Weeknd - Starboy (Full Motion Video) (by tombunyon) - The video runs at 12.5 frames per second with the audio being mono and running at 44100hz. However, all of the profanity is censored with a 1KHz tone.
We Are Number One except it's on Scratch (by tombunyon) The video runs at a 240x180 resolution (half the maximum resolution of Scratch projects) and at 25 frames per second with its audio running at 44100hz.
Games
3D Plane Game v2.4 (by childishbeat (that's me!), but remixed from blob8108) - The first version of my continuation of development of 3D Plane Game, which blob8108 stopped doing .
Jelly Jump 3D v5 (by WO997) - A game where you play as a light blue block and try to jump onto platforms as you avoid light green slime slowly going up. The 3D is good, and for me, it loaded in seconds and ran at an frame rate that was a bit low but didn't completely ruin the experience.
PaRappa the Rapper Stage 1 (by Shmish21) - A rhythm game that, as you might have been guessing, is based on the PaRappa the Rapper games.
Schoolferno (by DannyTheGamer (aka dannywaving)) - Unfortunately, it's in Italian (don't worry, dannywaving can also speak English), but I plan to make an English version of it through dubbing, subtitles or both. I don't think dannywaving would help me because I think he's too busy working on his online webseries A day with Bowser Jr (I think exams are stopping dannywaving from creating new A day with Bowser Jr animation), so I'll probably have to translate the game into English until I can find other people to help me translate Schoolfern into English.
Super Mario Kart v0.3 (by Finlay_Cool) - A partial remake of Super Mario Kart for the Super Nintendo Entertainment System. I think alexphan made a remix of this project along with minor improvements and deleted it along with his other Scratch projects, which he said is to start fresh.
Wolfenstein 3D (by nitroboss, but remixed from Finlay_Cool) - The menus and the facial animations on the HUD are missing (there's still a face on the HUD) and I think there's some other missing things from the official versions of Wolfenstein 3D, but it's still amazing to see that version of Wolfenstein 3D running in Scratch, considering it mostly looks and plays like the original game.
Tech demos
Norwich Gaming Festival 2017 26th March 2017 games archive (by childishbeat (that's me!)) - In case you're wondering, the Norwich Gaming Festival 2017 26th March 2017 games archive Scratch project is related to the Norwich Gaming Festival 2017 26th March 2017 games archive webpage on this website. By the way, the Norwich Gaming Festival 2017 26th March 2017 games archive Scratch project is based on my Scratch project Scrolling menu system demo, but also allows you to press the space bar to get information about the game that's currently selected.
Scrolling menu system demo (by childishbeat (that's me!)) - A Scratch project of a scrolling menu system where the controls are designed to be keyboard-friendly and mouse-friendly.
Utilities
8-Bit Music Maker (by hmnwilson) - A program that can be used to make 8-bit music. If you want a better 8-bit music maker, I recommend you use Beepbox (it's not a Scratch project) instead because it has more features and also is online and costs nothing to use.
Scratch Emulator v0.21.1 (by griffpatch) - A recreation of the Scratch project editor, but with a different interface and more primitive graphics. It also adds some new blocks never seen in unmodified versions of Scratch and omits some blocks from previous versions of Scratch.
Ultimate Game Creator 7 (by Yllie) - A convenient, advanced and easy-to-use level editor where levels can be easily shared to the world. On the downside, it might not load on all devices, but if it loads on the device you're using right now, I'm sure you'll be able to enjoy it. If it doesn't load on your device, I recommend you use it on a more powerful device, a better web browser or even a higher version of Flash Player.
Amazing Scratch projects that could be shared soon
Note: Some of these Scratch projects might never be released. As soon as I find out they've been released, if I have enough time, I'll start moving the Scratch project to where I know they'll need to go.
Emulators
A Z-machine interpreter with an unknown name (by A-KouZ1, but I might remix this Scratch project some time after its release, most likely to fix grammatical issues of the text if any grammatical issues of the text will be there) - I gave this emulator the name "A Z-machine interpreter with an unknown name" because I don't know what it's going to be called. When I find out what its name will be, I'll update this entry with what its name will be.
KChip-8 v2 (by A-KouZ1, but I might remix this Scratch project some time after its release, most likely to fix grammatical issues of the text if any grammatical issues of the text will be there) - It'll be a new and improved version of KChip-8. According to various screenshots I've seen that show relation to the project, including the project under its previous name of FPChip-8, I think new features will be one of the improvements, as well as a full graphical user interface (GUI) instead of the text/GUI mix-based interface of KChip-8.