agentsmith is a daemon that continuously monitors a log file for break-in attempts by remote hosts. Upon detection of a break-in attempt, it launches a user defined script or application, which can do virtually anything from sending mail messages to whatever else you might think of. The criteria for what is considered a break-in attempt can be configured by means of a regular expression.
A fail2ban lite. IPQ BDB is a netfilter userspace daemon that can block or mark IP packets according to iptables rules that issue the corresponding -j NFQUEUE, as well as a Berkeley database of bad IPv4 addresses. A log parser and a banning utility add entries to the database. An IP has to be caught a configurable number of times before being blocked. Transitions between blocked and non-blocked are faded using probabilities. A halving period governs IP rehabilitation.
VPPPN stands for virtual peer-to-peer private networking. The project provides a VPN client using a custom protocol to be able to set up a point-to-point dynamic virtual network. This differs from OpenVPN in that it does not need a central server to pass the network's traffic. A central server exists to allocate IP addresses and provide a point of contact for the clients, but once connections are established, these services are no longer needed. This means that a VPPN network is free (as in beer), since to set up a network you do not need to invest in an always-on Internet server. Once established, a VPPPN network behaves in a similar way to a normal IP network. To the end user, this means you can set up an office network and drag and drop files between computers in a secure manner over the Internet.
Suricata is an Intrusion Detection and Prevention (IDS/IPS) engine developed by the Open Information Security Foundation and its supporting vendors. The engine is multi-threaded and has native IPv6 support, file extraction capabilities, and many more features. It's capable of loading existing Snort rules and signatures, and supports many frontends through Barnyard2.
NSIA (Network System Integrity Analysis) is a Web application monitoring system that scans sites for potentially unwanted context such as defacements, unauthorized changes, errors, information leaks, profanity, and compliance issues. It operates as an IDS (Intrusion Detection System) for Web sites.
CreditCardNanny is a Web browser extension for Google Chrome and Mozilla Firefox that detects forms that otherwise look secure (with a proper and valid SSL certificate, encrypted, and seemingly safe to enter sensitive data such as credit card details) but actually then submit this form data in a cleartext email to the site administrators. This extension detects such forms and warns you of the possibility that sensitive information may be exposed in clear-text, putting you and your sensitive data at risk. You can test the extension by browsing to https://cc-nanny.appspot.com/test-secure-page, a dummy credit card form that uses a form emailer script, a very common pattern used on an alarmingly large number of Web sites.