An open-source reverse engineering platform powered by rizin. - github

• Destroying x86_64 instruction decoders with differential fuzzing - (x86_64) Instruction decoding is hard
  • Exploring x86-64 Instruction Encoding - Understanding x86 instruction encoding is far better done in octal - HN

Cutter

• Native integration of Ghidra’s decompiler

• Github -A Qt and C++ GUI for radare2 reverse engineering framework

(from StackExchange)

Atlernative

• Zydis - Another popular open source disassembly library, with an emphasis on speed and feature-completeness.
• Capstone / HN- A popular disassembly framework originally based on the LLVM project’s disassemblers.
• Binary Ninja (review)