n2 is a client/server system for transmitting forensic snapshots from a number of hosts to a receiver node. This receiver collects statistics and is able to present an overview of the current and historical situation on a server. n2 provides a robust solution for real-time monitoring, optimizing performance, and analyzing crashes.
KeyFrog monitors the keyboard and visualizes its usage statistics. The user can obtain much information about keyboard activity: the intensity of keyboard usage, how was it distributed in time, which applications were used, etc. This may be very useful, for example, to developers to monitor their productivity. The environment being monitored is the X Window System (text applications are explicitly supported if run inside an X terminal).
The ServerUsage system collects and processes statistical information from computers running a GNU/Linux Operating System. It is composed of two subprojects, the ServerUsage-Client to collect usage statistics (via a SystemTap module) and send them to a remote server via TCP, and the ServerUsage-Server to collect all statistics from different clients and aggregate them in a SQlite database table. A PHP Web service is available on the server module to extract information or display graphics.