Social Source Commons

Free backup software, providing advanced filtering and command line options

Free virus protection for your home PC

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!

The BCArchive software is designed to compress a group of files/folders to a single encrypted file.

Firewall software

An email encryption tool that is easy to use.

Disk encryption software.

Darik's Boot and Nuke ("DBAN") is a self-contained boot floppy that securely wipes the hard disks of most computers.

DeltaCopy is an open source, fast incremental backup program.

an easy to use and reliable program for imaging and backing up partitions and logical drives

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

A free anti-spyware protection tool developed by GRISOFT for home use

Recovers files instantly from hard drives, floppy drives and other types of fixed media.

FreeUndelete can help lost data from accidentally deleted files

Freemail is an email-like messaging system that transports all messages over Freenet 0.7 in order to achieve anonymity and censorship-resillience

ghost for unix - is a NetBSD-based bootfloppy/CD-ROM that allows easy cloning of PC harddisks to deploy a common setup on a number of PCs using FTP

Gmail is a web-based email with very user-friendly interface and huge storage capacity

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/

GPGshell is a graphic interface for GnuPG that allows you to use the cryptographic software GnuPG in a easy and user friendly way

Handy Recovery is an easy-to-use data recovery software designed to restore files that have been deleted from computers and floppy drives

Firewall software

Firewall software

Martus is designed to assist human rights organizations in collecting, safeguarding, organizing and disseminating information about human rights abuses. It enables grassroots NGOs to securely catalogue and store their records on off-site servers with easy

Integrated anti-virus, anti-spyware, firewall, anti-spam, anti-phishing, and backup technologies

Network Scanner is a free multi-threaded IP, NetBIOS and SNMP scanner

Firewall software

PC firewall software.

PGPi is the international variant of PGP (Pretty Good Privacy), a public key encryption program originally written by Phil Zimmermann in 1991.

Portable Gaim is the versatile Gaim instant messaging client packaged as a portable app, so you can take your IM settings and buddy lists with you. The Off-the-record plugin is also included for secure, encrypted messaging

Portable Firefox is a fully functional package of Firefox optimized for use on a USB key drive

Email encryption software

Recuva (pronounced "recover") is a freeware Windows utility to restore files that have been accidentally deleted from your computer.

You can store and track names, passwords, credit cards, software serial numbers and confidential notes in an encrypted form

Free/cheap Internet telephony and handy IM tool.

Free Spam Filter for Outlook and Outlook Express

Data backup software.

Firewall software

Syncronize Backup is a backup software for Windows platform that copies data directly on the hard disk or CD-rom

Mozilla's Open Source email client

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

Scans the hard drive for deleted but recoverable files and allows user to restore them.

Professional password manager with strong encryption and Palm support

Protection against malicious Internet content by restricting an application's access to system files and settings

Zfone is software for secure voice communication over the Internet (VoIP). It is created by Phil Zimmermann, the creator of the PGP encryption software. Zfone works on top of existing SIP- and RTP-programs, like Gizmo and SIPphone

Windows firewall software with free version for basic use.