Hachoir is a Python library used to represent a binary file as a tree of Python objects. Each object has a type, a value, an address, etc. The goal is to be able to know the meaning of each bit in a file. Hachoir is able to open invalid or truncated files. It only reads or computes data on demand to minimize load times. Many field types are predefined (integer, bit, string, etc.) and strings with a given character set (such as ISO-8859-1 or UTF-8) are supported. Addresses and sizes are stored in bits.
Linux Debug is a functional clone of the old DOS debug.com for x86 linux. Functions include the ability to alter/examine memory and registers, set/clear breakpoints, step into and trace over, symmetric symbolic disassembler, and symbolic assembler. It has a simplified UI, and can work with bin and elf format files. Symbolic functions work only if debug symbols available in the file header. It features a NASM-compatible syntax for both disassembler and single line assembler.
Boomerang is a decompiler that takes executable files and attempts to create a high level, compilable, possibly even maintainable source file that does the same thing. It does not matter if the executable file has symbols or not, or whether it was compiled using any particular language.
Debugtrace is a tool for printing execution traces that are helpful for debugging. It can generate instruction or call traces. It shows every instruction as it is executed, the values of registers that are written, and the memory that is read and written. It uses instrumentation rather than the debugging API, so it is much faster than doing the same thing with gdb. You can customize it to your own debugging needs. The tool works on Linux ARM, IA32, and EM64T.
J51 is a Intel MCS51 emulator with all the standard integrated peripherals. A disassembler with an integrated debugger is also included. Standard peripherals emulated are Timer 0/1 (Mode 0, 1, 2, and interrupts), serial interface in polled and interrupt mode, standard I/O, and ports 0 to 4. Microprocessors emulated are the Intel MCS 8051 (no peripherals), Intel 8051, Intel 8052, Philips LPC674, and Philips LPc900.
Linice is a source-level kernel debugger for x86 systems with the look and feel of SoftIce for MS Windows. It is designed for people who are already familiar with SoftIce, but anyone can quickly get used to it. It can break into a running kernel at any time using a hotkey and supports breakpoints and single step on modules, the kernel, or user programs. It supports the VGA frame buffer, the X Window System, serial connections, and monochrome adapters.