masa

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

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.

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

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

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

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

Automatic motion and screenshots for timelapses etc.

Several commands to edit or fix Minecraft worlds

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

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

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

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

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

Adds loot tables for the Wither and Ender Dragon

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

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

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

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

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.

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