Social Source Commons

User-friendly Linux distribution.

The Ubuntu promise:

* Ubuntu will always be free of charge, along with its regular enterprise releases and security updates

* Ubuntu comes with full commercial support from Canonical and hundreds of companies from across the world

* Ubuntu provides the best translations and accessibility features that the free software community has to offer

* Ubuntu core applications are all free and open source. We want you to use free and open source software, improve it and pass it on.

Linux distribution with a very strong community

PHLAK was created to become the only tool security professionals would need to perform security analysis, penetration testing, forensics, and security auditing

GNOME Desktop Environment and Developer Platform

Knoppix is a computer operating system which runs entirely from a CD or DVD drive, without performing an installation process or using the hard drive. Knoppix is a Debian based GNU/Linux distribution LiveCD, developed by GNU/Linux consultant Klaus Knopper

MyPasswordSafe is a straight-forward, easy-to-use password manager that maintains compatibility with Password Safe files.

A collection of floppy-based diagnostic tools and recovery Linux distributions all consolidated on one bootable CD

KDE default single pane file manager and web browser with KDE desktop integration

Puppy Linux

Shinkuro is a small software program that enables teams to securely share files, exchange instant messages, and do simple screen sharing.

The GNU Privacy Guard (GnuPG) enables people to securely exchange messages and to secure files with both privacy and strong authentication. GnuPG is a free software replacement for the PGP suite of cryptographic software.

Guardian Project port to Android: https://guardianproject.info/code/gnupg/

Multipurpose Linux server software.

Cygwin is a Linux-like environment for Windows.

KOffice is a free, integrated office suite for KDE.

Parallels for Intel-Macs that give you the flexibility of running Windows on a Mac OS X simultaneously

System Health Monitor for Linux is a handy python program that will setup your system to generate RRD Graphs of network interface traffic, system load, memory usage, disk space and inode usage and graphs of the number of running processes.

Easy to install & maintain Linux distro targetting small offices with no professional IT staff

A GNU/Linux distribution, that takes all the non-free blobs out of Ubuntu and makes it *really* free.

Desktop Data Manager is a Clipboard Manager for GNOME similar to Klipper for KDE. With DDM it is possible to display different types of content like text or images.

Additional DDM includes a screenshot taking application which is able to take screensho

Mandriva is a worldwide Linux and Open Source leader providing easy-to-use solutions to individuals and organizations.

SUSE® Linux Enterprise 10 is the serious choice for business. It is the only enterprise-grade Linux platform offering a complete solution for your mission-critical needs-from the desktop to the data center. When security, cost and reliability matter, companies choose SUSE Linux Enterprise from Novell.

K12 Linux Terminal Server.

Automatix is a graphical interface for automating the installation of the most commonly requested applications in Debian based Linux operating systems.

DragonFly is an operating system and environment originally based on FreeBSD.

The OpenBSD project produces a FREE, multi-platform 4.4BSD-based UNIX-like operating system

The GNU Hurd is the GNU project's replacement for the Unix kernel. The Hurd is a collection of servers that run on the Mach microkernel to implement file systems, file access control, and other features that are implemented by the Unix kernal.

Tomboy is a desktop note-taking application for Linux and Unix. Simple and easy to use, but with potential to help you organize the ideas and information you deal with every day.

OpenWrt is described as a Linux distribution for embedded devices.

Instead of trying to create a single, static firmware, OpenWrt provides a fully writable filesystem with package management. This frees you from the application selection and configuration provided by the vendor and allows you to customize the device through the use of packages to suit any application. For developer, OpenWrt is the framework to build an application without having to build a complete firmware around it; for users this means the ability for full customization, to use the device in ways never envisioned.

Squid is a caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. It reduces bandwidth and improves response times by caching and reusing frequently-requested web pages. Squid has extensive access controls and makes a great server accelerator. It runs on Unix and Windows and is licensed under the GNU GPL.

netfilter.org is home to the software of the packet filtering framework inside theLinux 2.4.x and 2.6.x kernel series. Software commonly associated with netfilter.org is iptables.

Kismet is an 802.11 layer2 wireless network detector, sniffer, and intrusion detection system. Kismet will work with any wireless card which supports raw monitoring (rfmon) mode, and can sniff 802.11b, 802.11a, and 802.11g traffic.

Stunnel is a program that allows you to encrypt arbitrary TCP connections inside SSL (Secure Sockets Layer) available on both Unix and Windows. Stunnel can allow you to secure non-SSL aware daemons and protocols (like POP, IMAP, LDAP, etc) by having Stunnel provide the encryption, requiring no changes to the daemon's code.

RRD is the acronym for Round Robin Database. It is a system to store and display time-series data (i.e. network bandwidth, machine-room temperature, server load average).

Nmap ("Network Mapper") is a free open source utility for network exploration or security auditing. It was designed to rapidly scan large networks, although it works fine against single hosts.

Revelation is a password manager for the GNOME desktop

gSTM is a front-end for managing SSH-tunneled port redirects. It stores tunnel configurations in a simple XML format. The tunnels (local, remote and dynamic) can be managed and individually started/stopped through one simple interface.

The Bastille Hardening program "locks down" an operating system, proactively configuring the system for increased security and decreasing its susceptibility to compromise. Bastille can also assess a system's current state of hardening, granularly reporting on each of the security settings with which it works.

Quite simply, this makes securing a Linux box a simple, educational process. And it's free!

WengoPhone is a free software Voice over Internet Protocol (VoIP) service. It allows users to speak at no cost from one computer to another. It also allows users to call landlines, cellphones, send SMS, make video calls and chat using various Instant Messaging services. WengoPhone is a FOSS alternative to proprietary systems such as Skype.

Kino is a non-linear DV editor for GNU/Linux. It features excellent integration with IEEE-1394 for capture, VTR control, and recording back to the camera. It captures video to disk in Raw DV and AVI format, in both type-1 DV and type-2 DV (separate audio stream) encodings.

LTSP is an add-on package for Linux that allows you to connect lots of low-powered thin client terminals to a Linux server. Applications typically run on the server and accept input and display their output on the thin client display.

Windows and Linux server virtualization software.

BackupPC is a high-performance, enterprise-grade system for backing up Linux, WinXX and MacOSX PCs and laptops to a server's disk. BackupPC is highly configurable and easy to install and maintain.

Git is a popular version control system designed to handle very large projects with speed and efficiency; it is used mainly for various open source projects, most notably the Linux kernel.

Commercial-supported package of WINE, a Win32 API compatibility layer, that allows Mac and Linux users to run Microsoft products without having to run the Windows operating system.

The Gnome Time Tracker is a to-do list/diary/journal tool that can track the amount of time spent on projects, and, among other things, generate reports and invoices based on that time. It's being used it to keep shopping lists, organize ideas, track bug reports, keep a diary of activities, do some blogging, provide weekly status reports to management, and even as a consultant billing system.

Gwibber is an open source microblogging client for GNOME developed with Python and GTK. It supports Twitter, Jaiku, Identi.ca, Facebook, Flickr, Digg, and RSS.

KVM (for Kernel-based Virtual Machine) is a full virtualization solution for Linux on x86 hardware containing virtualization extensions (Intel VT or AMD-V).

Gnu/Linux distribution based on Ubuntu - a complete operating system.

UNetbootin allows you to create bootable Live USB drives for Ubuntu, Fedora, and other Linux distributions without burning a CD. It runs on both Windows and Linux.

Full-featured open source video editor

B1 Free Archiver is an absolutely free and handy compression tool. Works under Windows, Mac, Linux and Android. Is 100% free for personal and corporate use.

Network visualization, including dynamics

Tizen is an open source, standards-based software platform supported by leading mobile operators, device manufacturers, and silicon suppliers for multiple device categories such as smartphones, tablets, netbooks, in-vehicle infotainment devices, and smart TVs. Tizen offers an innovative operating system, applications, and a user experience that consumers can take from device to device.

Pajek (Slovene word for Spider) is a program, for Windows, for analysis and visualization of large networks.