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.
WordPress
in 198 toolboxes Flexible open-source content management and blogging software with an active user and developer community and a wide variety of plug-ins or extensions available.
Drupal
in 159 toolboxes Very extensible CMS platform based on PHP and used by many NGOs - "Community Plumbing"
Firefox
in 345 toolboxes Firefox is the popular open source web browser from Mozilla
Skype
in 228 toolboxes Free/cheap Internet telephony and handy IM tool.
OpenOffice
in 203 toolboxes Full-featured open source office productivity suite, featuring word processor, spreadsheet, presentation, drawing and database packages; free MS Office replacement.
Ubuntu
in 136 toolboxes 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.
Google Earth
in 83 toolboxes Google Earth combines satellite imagery, maps and the power of Google Search to put the world's geographic information at your fingertips.
Thunderbird
in 137 toolboxes Mozilla's Open Source email client
MediaWiki
in 85 toolboxes Powerful wiki software built to support the Wikipedia project
Tor
in 30 toolboxes Free software for anonymous Internet communication.
PuTTY
in 71 toolboxes A Free Telnet/SSH Client
Enigmail
in 28 toolboxes Enigmail is an extension to the mail client of Mozilla / Netscape and Mozilla Thunderbird which allows users to access the authentication and encryption features provided by GnuPG
Audacity
in 96 toolboxes Free, open source software for recording and editing sounds.
Wikipedia
in 131 toolboxes Wikipedia is a global and multilingual Web-based cooperative free-content encyclopedia.
LinkedIn
in 144 toolboxes Social networking for non-social purposes with a focus on professional development, networking for jobs and problem solving through the expertise of those in your extended network.
Samba
in 19 toolboxes Domain management in multi-platform environments (Windows + Linux + Mac, etc) including user management, printer management, shared folder management, etc.
apache
in 62 toolboxes industry standard open source web server
AVG Free Edition
in 42 toolboxes Inexpensive antivirus software for up to five computers.
Truecrypt
in 19 toolboxes TrueCrypt is a free open source on-the-fly encryption (OTFE) program for Microsoft Windows XP/2000/2003 and Linux. It allows one to create a virtual encrypted disk within a file and then mount it as a real disk
Wireshark
in 15 toolboxes Sniffing Problems A Mile Away. The Ethereal network protocol analyzer has changed its name to Wireshark.
AWStats
in 9 toolboxes Free open source web site traffic analysis software.
Google
in 105 toolboxes Google is the quintessential search engine.
phpMyAdmin
in 60 toolboxes web-based interface for managing MySQL
VLC Media Player
in 79 toolboxes VLC media player is a highly portable multimedia player for various audio and video formats (MPEG-1, MPEG-2, MPEG-4, DivX, mp3, ogg, ...) as well as DVDs, VCDs, and various streaming protocols.
Social Source Commons
in 144 toolboxes The Social Source Commons is a “knowledge commons” that provides users with: a directory of software applications; links to relevant documentation, localization tools, services, user reviews; and a place to request tools/features.
OpenSSH
in 28 toolboxes Secure shell
Vim
in 16 toolboxes An improved version of the vi editor
MySQL
in 64 toolboxes Open source DataBase Management System
Firebug
in 51 toolboxes The ultimate in-browser code-monkeying and debugging utility. An undeniable reason to switch to Firefox. Installs as a toolbar in the browser.
GParted
in 12 toolboxes GParted is the Gnome Partition Editor application.
iptables
in 7 toolboxes 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.
OpenVPN
in 9 toolboxes OpenVPN is a full-featured SSL VPN solution which can accomodate a wide range of configurations, including remote access, site-to-site VPNs, WiFi security, and enterprise-scale remote access solutions with load balancing, failover, and fine-grained access-controls
