EquipLib

EqipLib is a lightweight library that helps creating handheld items and armor that will apply mob effects under different circumstances.

If you are a player, simply download a mod and put it under your mods folder.

If you are developer that wish to use this library – visit wiki to learn how to setup it in development environment and create items

Modpack makers can freely add the library to modpacks, though, a credit should be put somewhere

For developers, bundling (JarInJar or similar stuff) lib into your mod is prohibited