JSST has been archived so I can stay focused on a smaller amount of mods for now. It was mainly just a sandbox-y type mod I could add random features for, but would require a rewrite to make it more maintainable in current versions.
Provides a suite of server-side tweaks and survival-friendly tools to the game.
All features can be disabled individually, and are highlighly configurable. For more details, see the the wiki.

An in-game map editor, accessible by placing a map in an item frame and right clicking with a feather. You can add, rotate and add labels to a variety of icons, and easily remove them after.

A command to generate text on banners. Works in survival, as long as you have enough banners in your hand.

Players can now toggle the invisibility of item frames by sneak-right clicking with any invisibility potion. Shows particles when they're empty, so you don't lose them.

Adds the ability to customize the beacon's primary and secondary power set, as well as increasing the maximum level to 6. All features are fully configurable.

Adds a progress bar above cooking campfire items.


Sugarcane, when held in hand, will now highlight nearby dropped sugarcane items; useful for dense farms.
Players can also sneak-right click with an axe to find logs hidden in leaves.

Mined items will now aim towards the player when mined, and will always gain enough height to be picked up from above. Especially useful for Skyblock; you'll notice it pretty quick.

Sapling items, upon decaying, will now try to replant themselves nearby. They give eachother space and will group together for 2x2 saplings.
There are also a handful of other features not easily shown:
Works both in single players worlds, and server-side only. JSST is fine to add to existing worlds, but removing it will cause some custom map decorations and beacon powers to reset.
JSST requires Fabric API and YACL.