AMaViS (A Mail Virus Scanner) scans e-mail attachments for viruses using third-party virus scanners available for UNIX environments.

amavisd-new is a high-performance and reliable interface between MTAs and one or more content checkers, including virus scanners, and/or the Mail::SpamAssasin Perl module.

Eggdrop is an Internet Relay Chat (IRC) bot that can be extended using either C modules or Tool Command Language (TCL) scripts.

Python Paste is a web application framework framework. It uses WSGI to create a framework-neutral set of components. It also assists with application setup and deployment.

Zope is an application server specializing in content management, intranets, and custom Web applications. It is written in Python, has a transactional object database (with connected to relational database systems), and a security model for the delegation of control of web site content to various content owner. IRC Help with Zope: server: irc.freenode

Using CSS selectors to apply Javascript functionality

FVWM is a multiple large virtual desktop window manager with very modest resource consumption but highly configurable. Once configured it will suit working habits like no other window manager. It conforms to virtually all modern desktop specifications, supports transparency and antialiasing in every component. The backgrounds can be set on a per-desktop or per-screen basis with one of the many included modules.

Ion is a tiling (no overlapping windows) window manager that also has PWM-style tabbed frames which can contain multiple client windows.

ELinks is an advanced and well-established feature-rich text mode Web (HTTP, FTP, etc.) browser.

PWM is a lightweight x window manager that can have multiple client windows attached to a single frame, that can be switched between via tabbing. The author of PWM, Tuomo Valkonen, has ceased development on PWM and now works on PWM’s successor: Ion. Although PWM is now no longer being actively developed, PWM’s tabbed windowing feature has been extremely influential and many other window managers have copied it. External Links PWM FAQ

Roundup is a simple-to-use and install issue-tracking system with command-line, Web, and e-mail interfaces.

Valgrind is a tool that helps you find memory management problems in programs.

GNU DDD, the Data Display Debugger, is a GUI to command-line debuggers like GDB, DBX, JDB, XDB, Ladebug, WDB, the Perl debugger, or the Python debugger.

Xfce is a lightweight desktop environment for unix-like operating systems. It aims to be fast and lightweight, while still being visually appealing and easy to use. A priority of Xfce 4 is adhereance to standards, specifically those defined at freedesktop.org.

Fluxbox is a lightweight and highly configurable window manager with pwm-like tabs, based on the Blackbox window manager.

Blackbox is yet another addition to the list of window managers for X. It features small code size, a fast interface with simple menus, multiple workspaces, decorated windows, built-in graphics code to render solids, gradients, and bevels on the fly, and more. A derivative, Fluxbox, has added some features including pwm style tabbing.

ratpoison is a simple window manager with no large library dependencies, no fancy graphics, no window decorations, and no rodent dependence. It is largely modeled after GNU Screen, which has done wonders in the virtual terminal market. All interaction with the window manager is done through keystrokes (the word rat refers to the mouse, which is not needed when using ratpoison).

ircd-ratbox is an advanced, stable, fast ircd used on efnet and other networks.

Matchbox provides a lightweight, flexible base user environment for X11 applications on non-desktop embedded platforms.

ECMAUnit, a unit testing framework for ECMAScript (a.k.a. JavaScript), release 0.3.