ttmap passively analyzes values of TCP Timestamps in captured IP packets. After collecting enough data, it computes characteristic remote machine parameters. These values let it guess remote operating systems and identify unique machines behind a single IP address. For example, it can analyze remote IP load-balanced clusters.
vtwatch automatically switches the active virtual console on your Linux system in a loop, acting as a virtual terminal surveillance monitor. The speed at which they switch is configurable, and it is possible to input a search string, which you are notified about if it is found on a console.
Webtester is an application which is intended to be used in the testing and validation of Web-based applications. By reading an XML configuration file, the application is able to call URLs and use regular expressions to examine the results. Features include support for SSL, cookies, and variable assignment/substitution when sending and examining data.