Free data display debugger 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.

Extended Python Debugger is a complete debugger for Python than the stock pdb.py debugger.

It supports a "restart" command and stack traces that show fewer ?s and give better information for exec statements.

Stepping/nexting skips over method/function "defs". It tries to follow gdbs command set unless there is good reason not to.

EDB (Evans Debugger) is a QT4 based binary mode debugger with the goal of having usability on par with OllyDbg.

EDB project uses a plugin architecture, so adding new features can be done with ease. The current release is for Linux, but future releases will target more platforms.

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

Datalus allows the user to build complicated Web applications using simple XML descriptions and short scripts. Datalus abstracts much of the back end tedium from the process in an effort to prevent constant duplication of effort.
Datalus is a PHP based Web API designed to streamline object handling (loading, saving, querying, displaying, and editing), abstract the data from both its display structure and layout, and allow the target data to be delivered to any supported format without special handling logic or translation.
Enhancements:
- Data Primitives: Text Block, File, Float, Image, Instant, Instant (in time), Location, Reference, String, User
- Datasource Plug-ins: File, MySQL (may have multiples)
- Encodings for any primitive: AES, SHA, MD5
- XSL transformations support output to any output format through the core object XML dialect
- Commenting via OpenID on any object, RSS available on any object
- Built-in session, account management with menus
Default scripts
- Forum with flat and threaded views
- script for integrated use of Morevil web chat
- blog, photoblog, and static content scripts.
- multi-criterion search script generated from object descriptions.
Enhancements:
- added delicious library script
- added multiple logos for IE compatibility
- added itunes script (uses XSL transformations by Chris Veness)
- fixed result output error on users, menus
- fixed error in multipage list display selection (search errors on pages > 1)
- removed automatic RSS feed output link on lists

JTail is an advanced Java/Swing implementation of the Unix tail utility. JTail includes an intuitive GUI interface that enables the user to define multiple data filters and alarms.
In addition, the user can suspend and resume the display of data from the monitored file. When suspended, the user can single step through the new data being written to the files being monitored.
JTail can be used to monitor both files on both local systems and via the Fishcroft RfaServer (see below) on remote systems.
Enhancements:
- The JTail jar file is now a self-executing jar file.
- The ability to spawn new root windows from the File menu has been added.
- When filters are defined but none are activated, all output will be displayed.
- Output may be displayed with line wrap toggled on or off.
- Minor code cleanup. rfa.jar sources are included in the source tree.
- utils.jar sources are included in the source tree.

DISLIN is a high-level plotting library for displaying data as curves, polar plots, bar graphs, pie charts, 3D-color plots, surfaces, contours and maps.
DISLIN is intended to be a powerful and easy to use software package for scientists and programmers. There are only a few graphics routines with a short parameter list needed to display the desired graphical output. A large variety of parameter setting routines can then be called to create individually customized graphics.
The software is available for several C, Fortran 77 and Fortran 90/95 compilers on the operating systems UNIX, Linux, FreeBSD, OpenVMS, Windows and MS-DOS. DISLIN programs are very system-independent, they can be ported from one operating system to another without any changes.
For some operating systems, the programming languages textExtern Python, textExtern Perl and textExtern Java are also supported by DISLIN. The DISLIN interpreter DISGCL is availble for all supported operating systems. See a complete list of the supported operating systems and compilers.
A short description of the DISLIN features is given in Overview. DISLIN manuals can be downloaded as compressed tar files in PostScript, PDF and HTML format. An online manual is also available as an alphabetical list of all DISLIN routines.
DISLIN is free for non-commercial use. Licenses for selling programs linked with
DISLIN or for using DISLIN in an environment related to business are available from this site.
The DISLIN software and manuals can be downloaded via HTML and from FTP servers.
Enhancements:
- Thread-safe C libraries, additional character features, hardware symbols, an unlimited number of widgets, and bugfixes.