fdbg for AMD64 is assembler level debugger for user-mode (ring3) binary applications, running in long mode (64-bit).
Supported platforms: Windows x64 (XP, Win2003, Vista) Linux x64
Windows Version is GUI based.
Linux version is command line based (console) and doesn't need any library to run so it doesn't matter what Linux distribution you use.
fdbg project was started to help in debugging programs written in assembler to everybody who feels the power of assembler it is written in Flat Assembler and source files are included its syntax is similar to FASM it supports debug symbols and you can find some tricks in included help how to debug without symbols it is suitable for everybody who tries to create his/her first program written in assembler it has some features and power for experienced users too it is very small