edb|0.9.20|A QT4-based binary mode debugger with the goal of having usability on par with OllyDbg.|http://www.codef00.com/projects.php#Debugger
gdb|7.11.1|The GNU Debugger|http://www.gnu.org/software/gdb/
lldb|3.8.0|Next generation, high-performance debugger|http://lldb.llvm.org/
ollydbg|201g|A 32-bit assembler-level analysing debugger|http://www.ollydbg.de
peda|1.1|Python Exploit Development Assistance for GDB|https://github.com/longld/peda
rr|4.2.0|A Record and Replay Framework.|https://github.com/mozilla/rr
shellnoob|2.1|A toolkit that eases the writing and debugging of shellcode|https://github.com/reyammer/shellnoob
vivisect|482.cae2a9d|A Python based static analysis and reverse engineering framework, Vdb is a Python based research/reversing focused debugger and programatic debugging API by invisigoth of kenshoto|http://visi.kenshoto.com/