Platesmith
The Platesmith can create incredible plates that can be affixed to any metal weapons or armor to provide enhanced effects.
Exotic Weapon Master
This feat works together with the homebrewed exotic weapon rules in order to allow for a more specialized weapon at the expense of a feat.
Sole Crafter
The Sole Crafter can create marvelous attachments for any pair of boots, which provide enhanced mobility and a variety of bonus actions.