A number of people have sent in projects using Gibber with p5.js. First up is Lucas Swick, who used Gibber to visualize data from a live, incoming stream.
Next up is japp with a piano / synth visualization combo, including a live score visualization.
Ryan McGee also recently taught a class on synthesis and sonification for art students that used a lot of Gibber. I sat in on the final project presentations; it was fun seeing what people were able to come up with in a couple of months.