http://rada.re/ - Radare is a portable reversing framework that can Disassemble

https://github.com/radare/radare2

Radare is a portable reversing framework that can...

• Disassemble (and assemble for) many different architectures
• Debug with local native and remote debuggers (gdb, rap, webui, r2pipe, winedbg, windbg)
• Run on Linux, *BSD, Windows, OSX, Android, iOS, Solaris and Haiku
• Perform forensics on filesystems and data carving
• Be scripted in Python, Javascript, Go and more
• Support collaborative analysis using the embedded webserver
• Visualize data structures of several file types
• Patch programs to uncover new features or fix vulnerabilities
• Use powerful analysis capabilities to speed up reversing
• Aid in software exploitation