SIMtrace sniffs communication between a mobile phone and a SIM/USIM card. This can be useful for research and analysis, and for developing mobile phone and SIM toolkit (STK) software. The SIMtrace hardware is also capable of MITM (man in the middle) attacks on the SIM-MS communication.
perl-depends is a tool that roughly determines the modules a Perl program uses. Perl evaluates "use" commands at compile time and stores the loaded module information into the %INC variable. By examining the loaded modules and comparing them against the standard Perl modules, the external module dependencies can be roughly estimated.