MRTNK is a set of scripts to make graphics and html pages similar to MRTG, but these scripts are based on rrd databases and rrdtool graphics, this allows better graphics, and use of negative/non integer data.
colour_trace reads a trace file containing hexadecimal pointer values like 0x94f41a2 and colours them. Each pointer value gets its own colour, so you can see at a glance which values are the same.