Free silent debuggers software for linux

JSwat is a graphical, stand-alone Java debugger, using the JPDA library.
JSwat Java Debugger offers breakpoints with monitors and conditions, colorized source code display, single-stepping, displaying variables, viewing stack frames, and expression evaluation.
Main features:
- breakpoints with conditionals and monitors
- colorized source code display
- graphical display panels showing threads
- stack frames
- visible variables
- loaded classes
- command interface for more advanced features
- Java-like expression evaluation, including method invocation.

Brainfuck Debugger is designed to encourage the development of Brainfuck programs by providing an IDE with debugging features.

One of the goals of this project is to provide an environment for people who want to experiment with the fundimental processes of computers, but not get blown away with complicated syntax issues.

Bash Debugger project contains patched sources to BASH that enable better debugging support as well as improved error reporting.
In addition, this project contains the most comprehensive source-code debugger for bash that has been written.
Since this project maintains as an open CVS development and encourages developers and ideas, the space could be also be used springboard for other experiments and additions to BASH.
Enhancements:
- This release adds a gdb-like "load" command to force reading in a file.
- Files coming from function line-specifications are now read in (Debian Bug #40336).
- Negative numbers are now allowed in "frame" (and "up" and "down") commands.
- Help, manual page, and documentation fixes have been made, including suggested use of $PS4.

The Assembly Language Debugger is a tool for debugging executable programs at the assembly level. It currently runs only on Intel x86 platforms.
Operating systems supported: Linux, FreeBSD, NetBSD, OpenBSD
Main features:
- Step into / Step over
- Breakpoints
- Powerful ELF format interpreter
- Easy memory manipulation
- Disassembler for intel x86 instructions
- Easy register manipulation
Enhancements:
- added commands: display, ldisplay, undisplay to dump specified memory locations after each single step (thanks to ziberpunk < ziberpunk =at= ziberghetto dhis org > for the suggestion and code)
- all Makefiles are now based on automake in the hopes that this will fix some of the problems integrating ald into the *BSD ports systems
- bug fix where a pointer wasnt set to NULL after clearing program arguments with the "set args" command
- this is related to the previous feature: if the effective address lies inside a symbol/function, the corresponding symbol is now displayed
- for CALL and JMP instructions, exact target/effective addresses are now computed (code for this was contributed by Samuel Falvo II < kc5tja =at= arrl net >)
- upgraded all configure scripts to autoconf v2.59

pebugger is an interactive command-line based debugger for PHP, written in PHP. The project vaguely resembles gdb. Its basicaly a dbgp client.

This is currently in an early development stage. Its stable and usable, but not fully featured, yet. Its something I am keen to start using myself, so features should be added fairly quickly.

So far, you can set breakpoints, step through code, and query variables.

wsdebug is a debugger for the more or less famous whitespace programming language, coming along with a rather fast interpreter (wsi).

Most programming languages like C or Perl do not care for white space characters (like tab, space or newline/linefeed). The whitespace programming language works just the other way round, dont care for any character but those white space ones.

On the whole its just another geeky language like Brainfuck and others, however more adicting.

If youve written a whole lot of instructions youll probably reach the point, where you get lost. Then just put your script into wsdebug and step through your bunch of whitespace instructions and watch how each command manipulates the stack (or heap).

Simple Metronome (simetro) is a console program that provides basic metronome functions and supports accent patterns.
If all you want is a 100 bpm metronome, do this:
../simetro 100 9 | ecasound -f:s16,2,44100,i -i:stdin
A sightly fancier example would use simetro like this:
./simetro 240 6232
1st arg: 240 ticks per minute. 2nd arg: a string of one or more digits, possibly annotated with other non-digit characters. 0 is silent. 5 is medium. 9 is loud. The pattern 9099 means loud-rest-loud-loud. The example pattern, 240 6232, represents normally accented sixteenth notes at 60 beats per minute. The length of the second argument determines the length of the pattern.
Typical accent strings (second arg):
5, 73, 733, 8242, 8222, 832-632
For your convenience, you can add non-numeric characters (annotation) to the accent string. These characters are ignored by simetro. So 832-632 and 832632 are equivalent. The groove and military examples in the examples/ directory illustrate this. noaccent-100bpm is the simplest example. tabla is a fanciest example.
The first argument is "ticks per minute" so if you are representing your rhythm with one tick per beat, than the ticks per minute will be equal to the beats per minute. But if, for example, your ticks are 16th notes, then the ticks per minute will be four times the beats per minute.
There are two methods for hearing the output waveform.
1) Pipe the output to a realtime raw audio player.
2) Send the output to a file. Convert to WAV. Play WAV file.
Using Ecasound, you can do it like this:
./simetro 240 6232 | ecasound -f:s16,2,44100,i -i:stdin
This is probably the most practical configuration. Ecasound is good code and I recommend it. Or you can use some other program that can play an audio stream from stdin. Srp also works:
./simetro 240 6232 | srp > /dev/null
It starts immediately, does not create any files, and stops with CTRL-C. srp is part of my Simple Multitrack package which can be found at http://freshmeat.net/projects/simple-multitrack/ and runs on Linux/OSS and on Mac OS X. Other programs undoubtedly provide the same capability.
On Solaris 9, I use this bash command for realtime (but low quality) output:
alias rawplay="sox -t sw -r 44100 -c 2 - -t raw -r 8012 -u -b -c 1 /dev/audio"
./simetro 300 5222 | rawplay
If you want to make a file and play it (method 2), you can do this:
./simetro 240 6232 | dd bs=1024 count=10k > rawfile
sox -t sw -r 44100 -c 2 rawfile outfile.wav
sox is an audio format converter. You can get it here:
http://sox.sourceforge.net/
Please email your comments, suggestions, and bug reports to me. My email address is on my webpage: http://w140.com/kurt Please include the word simetro in your subject to skip the spam filter.
Enhancements:
- Rhythms can now be specified in a more convenient free-form syntax.
- It is easier to read and easier to write rhythms in the new syntax.
- More examples are included.
- Ecasound is used in the examples for sending the audio stream to the sound card.

QScintilla project is a port to Qt of Neil Hodgsons Scintilla C++ editor class.
As well as features found in standard text editing components, QScintilla includes features especially useful when editing and debugging source code.
These include support for syntax styling, error indicators, code completion and call tips. The selection margin can contain markers like those used in debuggers to indicate breakpoints and the current line.
Styling choices are more open than with many editors, allowing the use of proportional fonts, bold and italics, multiple foreground and background colours and multiple fonts.
QScintilla is licensed under the GNU GPL (for UNIX/Linux and MacOS/X), under the Qt Educational License (for use with the educational edition of Qt for Windows), and under a commercial license (for UNIX/Linux, MacOS/X and Windows).
At the moment the commercial version of QScintilla is bundled with the commercial version of PyQt. You can purchase it here.
Note that the educational edition is for educational institutions and not individual students.
QScintilla is provided in source form as a .tar.gz package for UNIX/Linux and MacOS/X, and a .zip package for Windows.
Enhancements:
- Lexers now remember their own style settings and so no longer need to be the current lexer for style changes to take effect.