Does anyone know any GOOD seeds for the iOS version?

Some weird code names...

I played Minecraft PE at first, but now I got the full version. It's boss, and I got technic loader with Yogbox, Tekkit, etc. May I ask what a Tekkit, Yogbox, and a technic loader is?

I only play MCPE.
Small, tightly cramped stoopid worlds are driving me insane.