Farsight [Forge/Neo]
See far chunks on clientside, even if the server has low view distance
YUNG's API (NeoForge) [1.20.4-1.21.1 ONLY]
A library mod for some of YUNG's Minecraft mods
Vein Mining (Fabric/Forge/Quilt)
A lightweight, highly configurable Vein Mining enchantment for tools.
TerraBlender (NeoForge)
A library mod for adding biomes in a simple and compatible manner!
Botarium
A crossplatform API for devs that makes transfer and storage of items, fluids and energy easier, as well as some other helpful things
Concurrent Chunk Management Engine
A Fabric mod designed to improve the chunk performance of Minecraft.
Sawmill
Ultimate Woodcutter. As it was intented, Compatible with ANY Mod, automatically. Includes Carpenter Villager
Inventory HUD+
Adds your main inventory, potion effects and your equipments to your HUD. And few other features.
More Overlays Updated
Adds NEI-like light overlay for mob spawns, a chunk border overlay and a JEI item search overlay. (updated for 1.16.5, 1.19, 1.21, 26.1) NEW: light level number overlay
Draconic Evolution
Draconic Evolution is a mod that adds some extremely expensive high tier items to the game.