ModdedPE is a launcher which allows you to open Minecraft PE and load NMods. ModdedPE can also be used as a library for your project.

Last MC have extractNative false

Here are some samples can help you develop NMods:
https://github.com/TimScriptov/NMOD-Examples

Would like to develop another mcpe launcher which can load NMods?
The Open Source NModAPI will help you a lot:)
https://github.com/TimScriptov/NModAPI

Listerily

XHook
Cydia Substrate
ELFIO