Mass is on a log scale. The 0-100% range maps on to 0.1 to 10 times the mass of the sun (50% = 1 solar mass).
Eccentricity for the planetesimals is from 0 (circular) to 100% (parabolic), via flavours of elliptical.
Terrestrial bodies are in cyan, gas giants in purple, and stellar mass bodies in yellow. Circles are sized to relative radius. Bars under the planets indicate apastron to periastron.
Alternatively, there is a Java implementation available as a Jar file, containing source as well as the class files. The jar can be used as a free-standing java application, invoked by
java -cp acrete.jar acrete.Main