Zyan Disassembler Engine (Zydis)
Our fast and lightweight x86 & x86_64 cross-platform disassembler library
https://github.com/zyantific/zyan-disassembler-engine
Documentation: https://zyantific.com/doc/zydis/index.html

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

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

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