IDASkins

Skinning plugin for IDA PRO allowing customization of the whole interface rather than just the disassembly
https://github.com/zyantific/IDASkins

remodel

Class remodeling library written in C++ https://github.com/zyantific/remodel
Documentation: https://zyantific.com/doc/remodel/index.html

REtypedef

Name substitution plugin for IDA PRO
https://github.com/zyantific/REtypedef