McJty

Alter biomes and/or blocks after worldgen

Library mod used by most mods by McJty and romelo333 (RFTools, XNet, Deep Resonance, Not Enough Wands, SignTastic, etc.)

Adds various very configurable utility wands to Minecraft

An adventure/exploration mod

Add a more immersive way to handle, craft and store objects in Minecraft

This is an addon mod for RFTools which handles creation of dimensions

Be In Control of mob spawns

Hazardous is a very configurable mod that adds hazards (like radiation, poison, ...) to your world. It's meant for modpack makers who want to spice up the world under certain conditions

All about signs and displaying text and images

All kinds of helpful baubles (using curios) for various buffs

Immersive Craft addon that works around water and cooking

A high-tech exploration and tech mod

Lost Radar is a companion mod for Lost Cities that adds an item that can be used to find and discover buildings

Mob spawn control and actions, continued for 1.12.2

Use the new RFTools textures made by MechWarrior99 in versions of RFTools 3.21 or older.

This mod makes the world a poisonous place to live

EFab steampunk styles crafting system

RFTools addon mod adding the builder, shield system and much more

MeeCreeps is a mod slightly influenced by a well known series

The Lost Cities addon to add more danger to the buildings.