Vital: https://vital.audio/ Free Synth DRUMBIT: https://drumbit.app/ A fun sequencer that you can programme and bounce beats out of. Source: about 1 year ago

Drum Machine This is a basic drum machine to keep tempo if you don't own a metronome, but those can be had for free on your phone. Source: over 1 year ago

I would highly recommend enabling click and drag to "paint" notes. As it is right now, if I want 16 closed hats, I have to move, click, 16 times. I'd rather drag to paint based on whatever state of the note I start on. The mutes on the left would be better if they mute the notes, not the sounds. Muting and then enabling can end up playing the tail of some of the longer sounds. This isn't typically how you want... - Source: Hacker News / over 1 year ago

Maybe some google sampler, something extremely limited that makes everything sound good. Something like this https://drumbit.app/. Source: over 1 year ago

I second this. Have a look here https://drumbit.app/. Source: almost 2 years ago

To "live DJ" there's the extremely famous https://virtualdj.com/ To create prerecorded DJ sets https://www.mixmeister.com/ Been using both for at least 10 years, love them both. - Source: Hacker News / 5 months ago

Not open source, but free for "home use" https://virtualdj.com/. - Source: Hacker News / 5 months ago

I started with Virtual DJ to get used to the software latency (I came from turntables) and get my muscle memory on button locations (which is why I stayed with the same brand). VDJ has every feature you need. The software is free to use without a controller from virtualdj.com. Source: over 1 year ago

A lot of the places that do it from scratch I notice use https://virtualdj.com/. Source: almost 2 years ago

DJ software, like VirtualDJ will have features that are more conducive to what you're trying to do, like live looping functions that help you lock the loop to the beat. It's also cheaper (free for non-commercial use without a hardware controller) than QLab, and it's cross-platform (QLab is Mac-only, if that matters). Source: about 2 years ago