Music modpack with API for easy in-game music playback and custom track registration.
Air Currents (wind)
Adds wind and air currents which can push objects and players.
A powerful engine for weather presets and visual effects. Requires a weather pack like Regional Weather.
Fruits on trees from various mods will regrow.
A set of free sounds & API.
Placeable Buckets for Catching Rainwater
Allows empty buckets to be placed as nodes in order to collect rainwater.
Enhanced Programmer for Ingame Control
Adds some better looking fireworks
Custom Falling Nodes
Tweak falling blocks to add custom controls
A collection of misc dependency-free utilities primarily for server hosts.
Timed World Modifiers library
Environmental ABM that could be triggered on a very wide range of nodes but only a few at a time.