Open Source Tools: Anti-Spam, Anti-Virus/Anti-Malware, Anti-Spyware, Application Firewall, Backup, Browser Add-Ons. PAGE ONE.
Open Source Tools: Data Removal, Encryption. PAGE TWO.
Open Source Tools: File Transfer, Forensics, Gateway/Unified Threat Management Appliances, Intrusion Detection, Network Firewalls. PAGE THREE.
Open Source Tools: Network Monitoring, Password Crackers, Password Management, User Authentication, Web Filtering. PAGE FOUR.
41. Wireshark Replaces OmniPeek, CommView, PacketView Pro
Calling itself "the de facto (and often de jure) standard" for network protocol analysis, Wireshark has won numerous industry awards and boasts a very large user base. It performs deep inspection of hundreds of protocols and, unlike many of the similar commercial products, it works on multiple platforms. Operating System: Windows, Linux, OS X.
42. tcpdump Replaces OmniPeek, CommView, PacketView Pro
This tool offers very similar functionality to Wireshark, but works from the command line instead of a GUI. Also, this version suports Linux systems only. Operating System: Linux.
43. WinDump Replaces OmniPeek, CommView, PacketView Pro
If you want to use tcpdump on a Windows system, this is the app you need. This site also provides a home to WinPcap, the packet capture and filtering engine used in a number of network monitoring tools, including some on this list. Operating System: Windows.
44. Ophcrack Replaces Access Data Password Recovery Toolkit, Passware
Every enterprise network administrator needs a password cracker now and then. This one works fairly efficiently and runs from a CD or can be installed on your system. Operating System: Windows, Linux, OS X.
45. John the Ripper Replaces Access Data Password Recovery Toolkit, Passware
Especially good at finding weak passwords, John the Ripper searches lists of common passwords looking for a match. It's not as good with strong passwords as the commercial apps or Ophcrack, but it works well in the many cases when users choose an easy-to-remember password. Operating System: Windows, Linux, OS X.
46. KeePass Password Safe Replaces Kaspersky Password Manager Roboform
KeePass stores your passwords in an encrypted database so that you only have to remember one master password. It doesn't fill in forms for you (like Roboform), but it does have a strong password generator to help you pick good passwords. Operating System: Windows.
47. KeePassX Replaces Roboform
If you use Linux or a Mac, this is the version of KeePass for you. Operating System: Windows, Linux, OS X.
48. Password Safe Replaces Kaspersky Password Manager Roboform
With a very simple interface, Password Safe offers a bare-bones password management system. It also offers the option of storing different sets of passwordsfor example, your work and home passwordsin different databases with different master passwords. Operating System: Windows.
49. WiKID Replaces Entrust IdentityGuard, Vasco Digipass
This two-factor authentication solution allows employees to access work servers remotely, customers to access online banking and other applications, and partners to access extranets. In addition to the free community edition, it's available in a supported enterprise edition. Operating System: OS Independent.
50. DansGuardian Replaces McAfee Family Protection NetNanny
In addition to blocking known objectionable Web addresses, DansGuardian also uses phrase matching and PICS filtering to filter out undesirable content. The default settings filter content appropriately for young children, but they can be easily adjusted to provide any level of filtering desired. Operating System: Linux, OS X.
Open Source Tools: Anti-Spam, Anti-Virus/Anti-Malware, Anti-Spyware, Application Firewall, Backup, Browser Add-Ons. PAGE ONE.
Open Source Tools: Data Removal, Encryption. PAGE TWO.
Open Source Tools: File Transfer, Forensics, Gateway/Unified Threat Management Appliances, Intrusion Detection, Network Firewalls. PAGE THREE.
Open Source Tools: Network Monitoring, Password Crackers, Password Management, User Authentication, Web Filtering. PAGE FOUR.