FamiStudio - NES Music Editor
https://bleubleu.itch.io/famistudio
FamiStudio is a very simple, DAW-style, music editor for the Nintendo Entertainment System. It is designed for both chiptune enthusiasts and the NES homebrew community.

SunVox
https://www.warmplace.ru/soft/sunvox/
SunVox is a small, fast and powerful modular synthesizer with pattern-based sequencer (tracker). It is a tool for those people who like to compose music wherever they are, whenever they wish. On any device. On any system. And it's free for most of the systems, except the Android and iOS.