If you want to step (deeper) into modular synthesis, Omri Cohen is one of the best teachers for that on YouTube. If you should not know, VCV Rack is a free software version for modular synthesis and there’s an iOS port available called MiRack.
Aesthetic is a free Vaporwave drum kit, packed with over a hundred kicks, snares, claps, toms and cymbals. As is typical for the genre, all sounds are based on vintage drum machines from brands, including E-MU, LinnDrum, Oberheim or Roland.
Brums is an advanced free drum Max For Live synthesizer from s8jfou.
4 Operators creating 4 different drum sounds.
Native Instruments offer a ton of sounds (2000) and instruments (Synths, Smaples Instruments) plus an organizer app (Komplete Kontrol) for free. Download here.
‘808 Drums’ is a highly versatile drum kit inspired by the Roland’s legendary drum machine. Designed natively for Ableton Live, ‘808 Drums’ is a rock solid tool that will fit right into your production pipeline. With 48 demo grooves included in the project you can dive deep straight into programming of new tracks, remixes & live sets.
Cassette Drums is a freeware VST and AU plugin bundle from BRP consisting of three individual plugins: Cassette 606 VST, Cassette 808 VST and Cassette 909 VST.