masa

A mod for dumping game registries, dumping the data for the held or looked at block/entity/item, counting blocks, biomes, entities, block entities from the world etc.

A client-side schematic mod with extra features for creative mode work

A small mod that removes the derpyness of broken Paintings and Item Frames

Servux is a server-side mod that provides support for some client-side mods, such as sending structure bounding boxes for MiniHUD

A client-side mod to show a preview of the block-to-be-placed

Allows tweaking some creeper and other explosion properties, like changing the item drop chance, disabling damage, or disabling them completely

Miscellaneous utility items and blocks, many are "ender themed" and inventory or storage related.

A small mod that can disable some or all of vanilla ore generation (including andesite/diorite/granite and silverfish blocks)

Adds a block that vanishes between a configurable time-of-day window

Painted Biomes allows using image templates for the world's biome layout

Automatic motion and screenshots for timelapses etc.

"Items control everything". Adds several blocks/machines that are programmed and controlled by item sequences.

A "mini F3" HUD mod, also with various overlays like light level, spawn chunks, slime chunks etc.

Various client-side tweaks, such as hand restock, hotbar swap/cycle, flexible/fast block placement etc.

It's raining. The water level is rising...

Add custom dimensions, configure existing dimensions, use per-dimension game rules, time, weather etc.

Adds loot tables for the Wither and Ender Dragon

A client mod that adds many shortcuts to move items easier and craft faster in inventory screens

Kosmolot's unofficial builds/ports of Masa Mods. For use only when there is no official release.

Several commands to edit or fix Minecraft worlds

A library mod for client-side mods. Contains most of the common/shared code of masa's client mods, and adds some inter-operation support between the dependent mods.

Adds a version of the vanilla Crafting Table that **can be** automated, but it requires some effort

Automatically run commands on world creation, dimension load, player login/logout/death and some other events