Free designed software for linux

Preview is a simple image viewer for GNUstep. It is designed to be easy to use and support GNUstep features such as image design, pasteboard/services, printing, and layout.

EasyChem is a program designed to draw chemical molecules, written under Linux and using Gtk+ 2.
Main features:
- Drawing very easily ornaments (non-bonding electron pairs, ...)
- EPS exporting with LaTeX fonts (Computer Modern)

The system can be used in the electronic world to keep track of your: Schematic, Printed Circuit Board, Front Plate, Programmable Logic Device numbers.
EDA index is programmed in PHP (and XHTML 1.0), using a MySQL database to store data, so its more or less OS independent, but a Linux server is recommended, since it already got most software installed as default, this configuration is also called LAMP (Linux Apache MySQL PHP)
Its also recommended that a local intranet server is used, since the system dont got a user login, so all data can be viewed without a password, but when you need to add or edit data a password is required. At first this approach might seem wierd, but its designed to allow quick lookups. Example:
You are sitting with a broken pcb with a number on it, and need to find the schematic (so you can repair it) on the computer or in the printed project (schematic) archive. EDA Index allow an quick lookup in the database, without you needing to login, so you get the job done faster.
As far as I know, there are no commercial (or free) program available that can do what EDA Index can, some companies may have created their own software, but how do that help you.
I have worked in an electronic department that had a self made application, but it lagged features like search.
This program is very usefull, if you are using numbers when:
Drawing electronic Schematics and PCBs using a CAD program like: Eagle, gEDA, Protel, Orcad, etc.
Creating Front Plate layouts in: GIMP, Coral Draw, Photoshop, AutoCAD, etc.
Programming Programmable Logic Devices like: PLD, EPLD, CPLD, PIC, APIC, PEEL, PAL, GAL, FPGA, Intel 80XX, Motorola 68XX, etc. Writing the code in: VHDL, Assambler, JEDEC, etc.
Enhancements:
- Included the bugfix to RC2.
- Updated online documentation.
- Updated INSTALL file.

KWebWatch is a small utility designed to monitor urls, checking for changes. It docks into the KDE 3.0 panel and can also be used as a launching pad for viewing urls in your favorite browser.

tuneroid is a tuner for variety of musical instruments. It is designed to tune musical instruments on PC using a microphone or directly connecting the instrument to the PCs sound card.

Proboscis is a pure Python driver/interface for PostgreSQL.

It is designed to give maximum flexibility to a user by providing protocol-level prepared statements and cursors.

It features basic SSL support, COPY TO/FROM, automatic encoding/decoding, and much more.

PlayVoIP is a webbased VoIP service enabler featured with user management, statistical report and registration application system based on LAMP and Asterisk.

At the beginning this project was specially designed for simple and free Indonesian VoIP network, VoIP Rakyat.

OpenChatterBox is an LANChat-like software which is designed for talking in Local Area Network (LAN). ChatterBoxes uses port 7777/UDP.

Public messages are plain-text, but private messages are encrypted (XOR). OpenChatterBox UI (User Interface) is Ncurses based, so you can use it via telnet/ssh, from local console or in Xterm.