Next Generation Open Source Firewall
Implementation of GlobalPlatform smart card specification
Web application firewall in C language uses libevent
Xplico is a Network Forensic Analysis Tool (NFAT)
A Windows password cracker based on rainbow tables
Two-factor authentication system
Free Web Application Firewall
Open Source Penetration Testing / Ethical Hacking Framework
Open Source Web Single Sign-On
A cryptocurrency like Bitcoin improved upon with reality binding.