Quokka is a cool synth on Koala Sampler

Quokka allows you to create sounds by generating waveforms directly, so you don’t need to sample or record audio first. This is much faster and more flexible than the old method with Koala Sampler, where you had to record something (like a voice maybe), then edit, shorten it drastically, and loop the sample to get synth-like sounds. Quokka allows me to skip all of these processes and just create a sound from nowhere.