AML Cartography provides AML and C code and documentation for cartography within the ARC/INFO geographic information system.
Nagiosgraph is an add-on for Nagios. It collects service perfdata in RRD format, and displays the resulting graphs via CGI.
SSH HTTP Proxy provides commandline and wxWidgets user interfaces for an HTTP(S) proxy that can tunnel Web requests over one or more SSH tunnels to one or more Web-specified servers, while using a direct connection for all other traffic.
An online interactive tutorial and free text assesments.
A C and C++ control flow graph generator and analyzer.