Free usability software for linux

Earth allows you to find files across a large network of machines and track disk usage in real time. The project consists of a daemon that indexes filesystems in real time and reports all the changes back to a central database.
This can then be queried through a simple, yet powerful, web interface. Think of it like Spotlight or Beagle but operating system independent with a central database for multiple machines.
Earth is initially focused on managing the explosion of data that occurs in digital visual effects work.
Enhancements:
- Many small usability improvements, several significant performance improvements for the Web application, reduced database size, code improvements, and a much improved command line interface to the Earth daemon.

Active PHP Bookmarks (APB) is a web-based program that allows you to store your bookmarks and display them in many useful ways.

It will sort your bookmarks with usability in mind, keeping often- used bookmarks at your fingertips.

It has a bookmark search, private/public bookmarks, nested groups, usage rankings, popularity sorting, and a quick add feature.

KXML Editor is application for KDE, that display and edit contents of XML file.
Main features:
- Drag and drop editing, clipboard support
- Use DOM level 2 Qt library parser
- KParts technology support
- DCOP technology support
- Editing KOffice compressed files
Enhancements:
- Updated /admin with latest kde-common/admin contents
- Switched the default item insert point to "at bottom" for the "New Element", "New Proc.Instr." and "New CData" dialogs.
- Implemented feature request #1044396 "Reload function".
- Fixed a little usability bug. Tabbing between the widgets work (better) now (all unvisible widgets reject focus on tab).
- Fixed the bug mentioned in feature request #1049159 "Keyboard shortcut for closing the "Edit XML as raw text" win".
- Implemented feature request #1048738 "F2 button for editing text content".
- Added fix_paths script to fix hardcoded paths in files generated by dcopidl2cpp

gcolor2 is a simple color selector that was originally based on gcolor, ported to use GTK+2, and now has a completely new UI.
Enhancements:
- Improvements include usability / UI enhancements, and sortable columns.

Escape is a tile-based puzzle game in the style of "Adventures of Lolo" or "Chips Challenge." Unlike either of those games, Escape doesnt rely at all on reflexes--its all about your brain.
Although it comes with hundreds of levels, the game places an emphasis on the composition of new puzzles. Thus it has a built-in level editor and facilities for automatically sharing puzzles with other players.
Enhancements:
- This release featured improved usability of the level browser, the ability to delete uploaded levels, sleeping bots, transponders and crossover wires, and many improvements to editor (including a pattern tool and a prefab system).
- Many bugs were fixed, including tile behavior problems, animation corner cases, and crashes.

Konzept is a small class diagram editor. Major design goal was usability.
The project was inspired by the static structure diagram editor of the Toolkit of Conceptual Modelling. Konzept is a pure Qt application written in Python.
Usage:
- select graphical elements within the toolbox the left
- right mouse button to place graphical shapes
- middle mouse button to connect two shapes with the selected connector type
- double click right mouse button to enjoy the inline editing and intelligent size adjustment
- maybe disable the grid or change its granularity to accomodate your taste
- save your documents somewhere and bring them back by dropping files from your favorite file browser

Graph-includes creates a graph of dependencies between source files and/or groups of source files, with an emphasis on getting readable and usable graphs even for large projects.
Graph-includes project is meant to be an helper tool for a refactoring effort. Usability of the dependency graphs are currently improved by customizable grouping of several source files into a single node, and transitive reduction of the graph.
Enhancements:
- Ported to non-Unix platforms (tested on Windows).
- This release has finally implemented/fixed node group coloring.
- A default path for system-includes lookup has been added.

Wazobia Linux is a complete Linux-based operating system designed and developed by Leapsoft.

Wazobia Linux distribution delivers quality desktop computing solutions that combine the best of open source technologies with a corporate attention to completeness, usability, and support.

It represents the next step in the evolution of the desktop computing in Africa and the rest of the developing world.

Wazobia Linux provides everything todays computer user needs for home and office desktop computing, including a stabilized, secure, stable and reliable, user-friendly Linux based operating system plus a complete set of desktop applications--office suite, Web browser, instant messaging client, multimedia viewers, and graphical software.

It also offers the latest open source applications for developing applications, setting up a home network, running a Web server, and more. Wazobia Linux includes more than 16,000 pieces of software, but the core desktop installation fits on a single CD.

The OS is accessible in Hausa, Yoruba and Igbo, to make users feel more at home in their computing environment. Leapsoft provides professional support for Wazobia Linux.