There are 4 repositories under minecraft-data-pack topic.
The Minecraft Technology Based Datapack
A Minecraft datapack maker and editor for 1.15 – 1.20.4 data packs
The source code for The Creeper's Code, an extensive Minecraft datapack designed to improve the vanilla survival experience.
Ambient sounds for Minecraft.
One Player Sleep Data Pack for Minecraft 1.13 to 1.16
A data pack for Minecrafters who like playing without monsters.
Bible Datapack for Minecraft 1.14
Burning entities/items such as torches or lanterns emit light!
A Minecraft Datapack creator and editor
The compiler for the CraftLang programming language
A Minecraft data pack that adds programmable turtles
SimplEnergy is a simple Energy Datapack created to add simples energy mechanics in your survival world. It is also created to help the development of Energy Datapacks, it was made as a template for whoever wants to create its own
Hostile mobs dig out of the ground or poof into existence when they spawn!
Stardust Fragment is a very advanced Adventure & Technology Minecraft data pack created to add a very special experience to the game.
A vein miner datapack for Minecraft.
Data Pack to make Shulkers respawn in End Cities. Works on Minecraft 1.13 onwards
Multiple hoe functionalities datapack for Minecraft.
A Minecraft datapack that emulates a MIPS processer
Essential functionality for vanilla Minecraft servers and Realms
Player Head Drops data pack for Minecraft 1.14++ using player entities loot tables
Time and season system datapack for Minecraft.
a Compiler that compiles python code into Minecraft datapack functions
A collection of data packs to add a custom battle royale game mode to any Minecraft world!
Minecraft datapack for lazy string/wool/carpet/sponge/etc crafting
Data pack for playing the minigame Musical Blocks in vanilla Minecraft.
Minecraft Data pack Library for handling custom durability on every damageable item (vanilla & custom).
Improving Minecraft vanilla bees mechanics.
Humanoid mobs get new variants through over 85 custom player heads or unused vanilla mobs! No Resource Pack needed!