Edit files/disks in hex, ASCII and EBCDIC

ncurses-hexedit

Edit files/disks in hex, ASCII and EBCDIC

Hexedit is a file editor which allows editing and viewing a file in hexadecimal, along with its ASCII or EBCDIC text equivalent. Standard editing features include insert, delete, search (text or byte searches), highlighted changes, undo, two different viewing formats, and full screen text snapshots. Allows editing of fixed disks as well. Includes a binary/octal/decimal/hex converter.
information about hardware configuration

lshw

information about hardware configuration

A small tool to provide detailed information on the hardware configuration of the machine. It can report exact memory configuration, firmware version, mainboard configuration, CPU version and speed, cache configuration, bus speed, etc. on DMI-capable x86 systems, on some PowerPC machines (PowerMac G4 is known to work) and AMD64.
Qt Visual Graph Editor

qvge

Qt Visual Graph Editor

This is a multiplatform graph editor written in C++/Qt. Its main goal is to make possible visually edit two-dimensional graphs in a simple and intuitive way.
a LOGO-like tool for teaching programming

turtleart

a LOGO-like tool for teaching programming

Ubuntu modifications for Firefox

xul-ext-ubufox

Ubuntu modifications for Firefox

XPath (XML Path Language) visualizer

xacobeo

XPath (XML Path Language) visualizer

Xacobeo provides a simple graphical user interface (GUI) for executing XPath queries and seeing their results.