OTR allows you to have private (not just encrypted) conversations over instant messaging by providing: Encryption, Authentication, Deniability, and Perfect forward secrecy.
3.0.0
GNU General Public License
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.
Delicious
in 173 toolboxes Web based social bookmarking lets you share online finds and discover new ones. Ground zero for tagging.
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.
Pidgin
in 91 toolboxes A multi-protocol Instant Messaging (IM) client
Thunderbird
in 137 toolboxes Mozilla's Open Source email client
Ruby on Rails
in 29 toolboxes Web application framework
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.
GIMP
in 116 toolboxes A freely distributed piece of software for such tasks as photo retouching, image composition and image authoring.
Mac OS X
in 68 toolboxes Apple's desktop operating system.
Adium
in 62 toolboxes Adium is a free instant messaging application for Mac OS X that can connect to AIM, MSN, Jabber, Yahoo, and more.
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.
GNU Privacy Guard (GnuPG)
in 25 toolboxes 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/
