Traben

Gives fluids realistic flowing physics, making them mostly finite. With various settings for performance, visuals, and gameplay interaction.

Allows for entity sound variation using OptiFine format property rules

Emissive, Random & Custom texture support for entities in resourcepacks just like Optifine but for Fabric

Makes vanilla armor 3D using ETF + EMF

A mod allowing the exploration & exporting of all the resources & packs available to Minecraft, as it sees them.

Lets arrows stick into most mobs, not just players.

Makes shot arrows look just like their item sprites. Works with all 16x resourcepacks. Requires EMF or OptiFine.

Gives mobs collisions & interactions like blocks.

EMF is an, OptiFine format, Custom Entity Model replacement mod available for Fabric and Forge.