I open-sourced 12 android/web games github.com/dvhx/games

I also made Pedalgen, it's a ngspicejs script that generate random analog guitar pedal matching your required distortion and gain and other characteristics github.com/dvhx/pedalgen

Some time ago I made SMD soldering exercise - 23 guitar pedals on one 10x10cm board - github.com/dvhx/smd-sol...

Here's another tool I made for finding spice model of a diodes: dvhx.github.io/spice-diode-... - Just add measured forward voltages and currents and it will find IS, N and RS parameters.

I made a tool to make super accurate JFET Level 2 Spice models: github.com/dvhx/jfet-mo...