RefDbg GObject reference count debugger. GObject is used as a base library for GTK+, Gnome, Gstreamer, and many other projects. Software bugs related to GObject reference counting can be very hard to find and can cause memory leaks or program crashes. RefDbg aims to make the task of fixing these bugs easier.
ErrorLog allows web developers quick and easy access to clearly formatted entries from the apache error_log file, viewable through a standard browser. It is designed with the developer in mind, with a focus on debugging CGI error logs. It by provides formatted HTML display of the log messages, merges multi-line entries while preserving whitespace formating, adds some highlighting for common elements (such as file paths, quoted strings, timestamps and digits) and transforms referrer strings into hyperlinks.
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.
remake is a patched and modernized version of GNU make utility that adds improved error reporting, the ability to trace execution in a comprehensible way, and a debugger. The debugger lets you set breakpoints on targets, show and set variables in expanded or unexpanded form, inspect target descriptions, see the target call stack, and even execute arbitrary GNU make fragments (e.g. add a dependency to an existing target).
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.