Happy ghast whistle: use a goat horn to teleport your happy ghast to you from anywhere, even from unloaded chunks
Annuus
Annuus is a mod for minecraft networking, improves network performance and makes the game more available for running on large server.
Project Red Fabrication
A collection of mods that aim to vastly improved Redstone circuitry with wiring, logic gates, integrated circuits, and more. Heavily inspired by Red Power by Eloraam.