Gateway Security Appliance

26. Untangle

Untangle offers an all-in-one approach to security and privacy protection. It includes firewall, anti-spyware, intrusion prevention, Web filtering, anti-spam, anti-virus, VPN, and more into one download that can be used to turn any PC into a security appliance. Operating System: Linux.

27. Endian Firewall Community

Similar to Untangle, the Community edition of Endian Firewall Community offers an open-source way to turn an old system into a unified threat management appliance. It includes firewall, anti-virus, anti-spam, content filtering, and a VPN. Operating System: Linux.

Intrusion Detection/Prevention

28. Snort

No list of open-source privacy tools would be complete without Snort, the most widely used intrusion detection and prevention system in the world. Key features include real-time traffic analysis, protocol analysis, content searching, packet logging, and more. Operating System: Mac, Linux, Unix, BSD, Solaris.


A favorite with large organizations, OSSEC offers advanced intrusion detection capabilities and runs on nearly all platforms. Its capabilities include real-time alerting, file integrity checking, log analysis, Windows registry monitoring, and rootkit detection. Operating System: Windows, Mac, Linux, Unix, BSD, Solaris.


30. F5 Blackberry Utilities

Looking for privacy tools for your Blackberry? This package includes a password safe and a signal location utility. Operating System: Blackberry.

Network Firewall

31. IPCop

If you have an old system sitting around, IPCop lets you take that box and turn it into a firewall to protect your personal or small business network. It's Linux-based and includes remote management. Operating System: Linux.

32. SmoothWall Express

Winner of numerous awards, SmoothWall calls itself "The World's Favourite Network Firewall." The open-source Express version is designed for small networks, while enterprise users are encouraged to purchase the commercial SmoothWall Limited. Operating System: Linux.

33. FREESCO Router

This Linux-based tool includes firewall, NAT, and a router/server that fits on a single floppy disk. Its designed as an alternative to more expensive routers from Cisco, 3-Com, Nortel, or others. Operating System: Linux.

34. LEAF

Short for "Linux Embedded Appliance Framework," LEAF can be used as an Internet gateway, router, firewall, or wireless access point. The Web site also includes links to a number of branches that add other functionality, notably Oxygen, which adds network debugging to firewall capabilities. Operating System: Linux.

PDF Tools

35. jPDF Tweak

This app lets you make lots of changes to pdf files, including combining multiple files, splitting files, re-ordering pages, and most important for a list of privacy tools, encrypting and decrypting files. It's written in Java, so you can use it on any OS, and it is available in both compact and normal versions. Operating System: OS Independent.


36. KeePassX

KeePassX stores usernames, passwords, urls, and attachments in a database encrypted with either AES or Twofish. It also includes a password generator and advanced grouping and labeling functions which make it easy to manage your passwords. Operating System: OS Independent.

37. phpChain

This a Web-based project that encrypts data using the Blowfish algorithm. Unlike other password managers, this one makes it easy to access your passwords even when you're not using your own system—just log in to the phpChain site. Operating System: OS Independent.

Personal Information Manager

38. Total Text Container

Total Text Container stores all of your important and potentially sensitive information in one place under multi-layer encryption. From this one app you can access email, contacts, text files, diagrams, spreadsheets, bookmarks, passwords, money transactions, and more. Operating System: Windows.

Proxy Server

39. Privoxy

Based on Internet Junkbuster, Privoxy lets you set up a proxy server for privacy protection, Web filtering, removing ads, etc. It's easy to customize, and can be used with a network or a standalone system. Operating System: Windows, Linux, Unix, OS X, BSD, Solaris.

40. Anon Proxy Server

Supporting http, https, and socks, this is a fast, relatively easy-to-configure proxy server. It also supports an anonymous P2P proxy network. Operating System: Windows, Linux.