Web++:

Insight Server is a completely integrated Linux email groupware server with components that include anti-spam and anti-virus applications, backup software, and a high availability system.

An Ajax based Email and Web collaboration suite with the ability to share email folders, contacts, calendars, files, and carry out online document authoring with internal or external users.

Forked from the light-weight slypheed e-mail client, Claws Mail is a cross platform email client with a lot of interesting features including support for RSS and newsgroups.

Organize, secure and customize your email with Thunderbird – a solid application, tried, tested and used widely.

LimeSurvey (formerly PHPSurveyor) is a PHP survey software to create online surveys. Features open/closed surveys, branching, participant administration, quotas, WYSIWYG HTML editor, email invitations & reminders, assessments, basic statistics and more.

Userful Pre-Book is a full featured, open source, PC booking and reservation system. Patrons can book time on a computer from home, the office, school or using a walk-up booking at the library itself. Policy settings ensure that the library retains full control over usage.

Libki is a Computer Kiosk Management system. Libki is used to allow time limited access to computers on a network.

Launchy is a free cross-platform utility designed to help you forget about your start menu, the icons on your desktop, and even your file manager.

Cacti is a complete network graphing solution designed to harness the power of RRDTool’s data storage and graphing functionality.

Arduino is an open-source electronics prototyping platform based on flexible, easy-to-use hardware and software. It’s intended for artists, designers, hobbyists, and anyone interested in creating interactive objects or environments.

Maxima is a computer mathematics program for the manipulation of symbolic and numerical expressions, including differentiation, integration and much more.

WinMerge is an Open Source visual text file differencing and merging tool for Windows. It is highly useful for determing what has changed between project versions, and then merging changes between versions.

CuteCom is a graphical serial terminal aimed mainly at hardware developers or other people who need a terminal to talk to their devices.

Inquisitor is an open-source hardware testing and certification system, suitable for both enterprise and home use, customizable, modular and available in both serverless Live CD/DVD format and server-controlled network boot production system.

WinDirStat is a disk usage statistics viewer and cleanup tool. It displays your disk usage in a color-coded map that shows what file types and folders take up the most space on your hard drive.

Lilina is a simple aggregator which runs on your server, enabling you to access your news wherever you are. It supports both RSS and Atom and works with both PHP 4 and 5.

Harddisk partition editor

innotek VirtualBox is a general-purpose full virtualizer for x86 hardware. Targeted at server, desktop and embedded use, it is now the only professional-quality virtualization solution that is also Open Source Software.

Domain Hunter is a simple application to monitor the state of a list of domain names. Changes in the status of a monitored domain can be sent to an email address or the domain information can be obtained on demand through a Web interface.

Free Open Source Computer Cloning Solution.

Wine is an Open Source implementation of the Windows API on top of X, OpenGL, and Unix.

Edubuntu is an educational operating system that is a part of the Ubuntu family. It aims to make Ubuntu, the popular Linux-based operating system, a great choice for the computing needs of children, students, parents, teachers, and schools.

Qimo is a desktop operating system designed for kids. Based on the open source Ubuntu Linux desktop, Qimo comes pre-installed with educational games for children aged 3 and up.

Jolicloud is a Linux-based operating system based on Ubuntu Linux, but is tweaked for netbooks and other computers with limited disk storage, memory, and screen size.

Inquisitor is an open-source hardware testing and certification system, suitable for both enterprise and home use, customizable, modular and available in both serverless Live CD/DVD format and server-controlled network boot production system.

PC/OS is an open source operating system that concentrates on bringing ease of use and unsurpassed desktop performance to the client desktop and Server arena.

Debian is an operating system that uses the Linux kernel and toolsfrom the GNU project; hence the name Debian GNU/Linux.

FreeBSD® is an advanced operating system for x86 compatible (including Pentium® and Athlon™), amd64 compatible (including Opteron™, Athlon™64, and EM64T), UltraSPARC®, IA-64, PC-98 and ARM architectures.

NetBSD is a free, secure, and highly portable Unix-like Open Source operating system available for many platforms, from large-scale server systems to powerful desktop systems to handheld and embedded devices.

OpenBSD is a multi-platform 4.4BSD-based UNIX-like operating system with an emphasis on portability, standardization, correctness, proactive security and integrated cryptography.

Pardus is a GNU/Linux distribution funded and developed by the Scientific & Technological Research Council of Turkey. It is an operating system designed around the premise of ‘ease of use’ and it also has somewhat of a ‘fun’ feel to it.

Dreamlinux is a modern and modular Linux system that can be run directly from the CD and optionally be easily installed onto your Hard Drive.

eyeOS is an Open Source Operating System in which everything resides on a web browser. It allows you to access your desktop, applications and files whevere you have an Internet connection.

xmonad is a tiling window manager for X11 offering stable and fast tiling. xmonad is customisable with a large extension library and offers extensive documentation for support and hacking.

GHC is a state-of-the-art, open source, compiler and interactive environment for the Haskell programming language.

Haiku is currently in development and aims to be a free operating system that provides users of all levels with a personal computing experience that is simple yet powerful, and free of any unnecessary complexities.

Solaris is Sun Microsystems’ UNIX-based operating system with roots in the BSD operating system family. It supports SPARC-based and x86-based workstations and servers from Sun and other vendors.

Ubuntu, from the Zulu meaning ‘humanity to others’, is a community developed, Linux-based operating system with a rapidly growing user base. It contains all the applications you need – a web browser, presentation, document and spreadsheet software, instant messaging and much more.

Developed by Linus Torvalds, Linux is the kernel at the heart of all Linux based operating systems. The Linux core is available in several formats known as ‘distributions’ – each distribution has its own set of features and functionality that makes it unique.

Save time by using KATO agents to do your online routine chores for you.

Lilina is a simple aggregator which runs on your server, enabling you to access your news wherever you are. It supports both RSS and Atom and works with both PHP 4 and 5.

Liferea (Linux Feed Reader) is a GTK desktop news aggregator for online news feeds and weblogs. The project focus is on simplicity and easy installation.

Vienna is an RSS/Atom newsreader with article storage and management via an SQLite database, built for Mac OS X.

A solid cross-platform RSS client that lets you gather, organize, update, and store information from any RSS Feed in a convenient, easy to use interface

Angry IP Scanner (or simply ipscan) is an open-source and cross-platform network scanner designed to be fast and simple to use. It scans IP addresses and ports as well as has many other features.

Untangle is a software suite that effectively acts as a router, firewall, spam blocker, web filter, virus blocker, fishing blocker, etc …. It is easy to use and sets up in a flash.

Inquisitor is an open-source hardware testing and certification system, suitable for both enterprise and home use, customizable, modular and available in both serverless Live CD/DVD format and server-controlled network boot production system.

Eraser is an advanced security tool (for Windows), which allows you to completely remove sensitive data from your hard drive by overwriting it several times with carefully selected patterns.

TrueCrypt is a software application used for on-the-fly encryption (OTFE). It can create a “file-hosted container” or write a partition which consists of an encrypted volume with its own file system, contained within a regular file, which can then be mounted as if it were a real disk.

xpy is a small tool which disables the default threats of a Windows XP installation. Besides disabling Windows and some of its components to communicate with Microsoft servers, xpy improves privacy settings and your system’s security.

KeePass is a free/open-source password manager or safe which helps you to manage your passwords in a secure way. You can put all your passwords in one database, which is locked with one master key or a key-disk.

GnuPG allows to encrypt and sign your data and communication, features a versatile key managment system as well as access modules for all kind of public key directories.

DBAN is a program designed to securely erase a hard disk until data is no longer recoverable, by overwriting the data with random numbers.

Password Safe allows you to safely and easily create a secured and encrypted user name/password list. With Password Safe all you have to do is create and remember a single “Master Password” of your choice in order to unlock and access your entire user name/password list.

ClamWin is a Free Antivirus program for Microsoft Windows 98/Me/2000/XP and 2003. It features a high detection rate for viruses and spyware, scanning scheduler, automatic downloads of updated virus databases and more.

Google Chrome is a browser that combines a minimal design with sophisticated technology to make the web faster, safer, and easier.

Flock is a cross platform web browser built on Mozilla’s Firefox codebase. It is well known for its ‘web 2.0′ fatures, seamlessly integrating social media and networking services such as Facebook, YouTube, Twitter, Flickr, Blogger, etc.

Sea Monkey is an all in one web-browser, advanced e-mail and newsgroup client, IRC chat client, and HTML editing suite.

Amaya is a Web editor/Browser, i.e. a tool used to create and update documents directly on the Web. Browsing features are seamlessly integrated with the editing and remote access features in a uniform environment. This follows the original vision of the Web as a space for collaboration and not just a one-way publishing medium.

K-Meleon is an extremely fast, customizable, lightweight web browser for the Win32 (Windows) platform based on the Gecko layout engine.

Built for Mac, Camino provides the visual and behavioural experience central to Macs plus the powerful web-browsing capabilities of Mozilla Foundation’s Gecko rendering engine.

The most widely used open-source browser, Firefox includes an easy tab system, pop-up blocking, custom themes, and plugins. Over the past couple of years it has become the browser of reference.