WaveTracker is a free and open source music-making software for Windows. It uses basic wavetable synthesis and sampling to generate sounds, with endless combinations of effects to warp, modify or distort waves and sounds.

It's just a week old and looks super dope. Wavetracker is inspired by Famitracker and pxTone Collage.

Wavetracker github

Dn-FamiTracker that is also open source^[1]^

[1] It's under GPLv3 with various blobs