Sam is a Morse code trainer. It is a bash script that runs in a terminal. It beeps and boops out the command-line arguments in Morse code. If there are no command-line arguments, then it beeps and boops the Usage message. Simple, no? But the gimmick is that it prints out the text to the terminal, and the cursor below the text keeps track of which letter is being sounded.
SWATnalysis is a utility that runs the Soil and Water Assessment Tool (SWAT) and analyzes its output files. It converts archaically formatted SWAT output files into more user friendly CSV files, performs graphical analysis, calculates area weighted precipitation values, and performs statistical analysis of observed data versus simulated data.
AudioScope is a text mode audio oscilloscope that captures sounds using DEMO, SOX, or DSP (/dev/dsp}. It is primarily a learning tool for kids. The script includes code and circuit diagrams for calibrating the horizontal and vertical axes. It features a demo mode with no dependences that samples /dev/urandom.