KJWaves is a frontend for SPICE3, NGSpice and GnuCAP simulators written to be a cross-platform tool in pure Java using NetBeans and runs on any platform where you can install a release of Java virtual machine. KJWaves can be used as a simple plotting program to display the content of a spice RAW file or as a complete frontend to the simulator. You can use KJWaves to load and edit a spice netlist, spawn a spice process and display the results, modify it and resimulate and it aids in viewing, modifying, and simulating circuit files (cir file) through an interactive GUI. It supports waveform math, copying to clipboard, and saving. Output graphs can be saved or printed. For more information about KJWaves, click here.