For C (and CPP obviously):
Include a fast and tiny RAM-tracing feature for Real-Time (RT) debugging purposes.
>> ONLY FOR DEBUGGING <<
Very much faster than printf-debugging, which may result in unforseen results in an RT environement.
wxHexEditor is another Hex Editor, build because of there is no good hex editor for Linux system, specially for big files. It supports files up to 2^64 bytes. Written with C++/wxWidgets GUI libs and can be used with other OS'es such Windows, Mac OS
Softx86 is a library that provides software emulation of an Intel 80x86 CPU. The library takes care of executing opcodes and handling exceptions while the host application is responsible for providing simulated RAM, I/O devices, external signals.