Modular synthesizer and pattern-based tracker from Alexander Zolotov (WarmPlace). You wire synth and effect modules into a graph and sequence them in tracker patterns. It is small and fast, runs on very old hardware, and does well at electronic music, generative loops and sound design. It exports WAV (including multitrack) and MIDI. It is actively developed; the latest release is 2.1.4d (29 Dec 2025).
At a glance
Licence
custom
Commercial use
commercial OK
Credit
Not required
Status
active: License spot-checked at the source; the entry carries dated evidence.
custom: proprietary freeware. It is free on Windows, macOS and Linux (and Windows CE), and paid on iOS and Android. This entry covers only the free desktop downloads
The bundled licence (docs/license/sunvox.txt) puts no restriction on content you create, and allows free redistribution of the program
Bundled codecs (libvorbis, libFLAC, Tremor) and contributed modules have their own files in docs/license/
A separate SunVox library lets a game play .sunvox projects at runtime. Its page says you can use it in commercial products, but also "read the license file" inside sunvox_lib-2.1.4d.zip, which was not read on 2026-09-30. Check that file before shipping the library; rendered audio does not need it
The site says that since 2024-12-27 Google does not allow buying apps from developers registered in Russia, so the paid Android version is sold through a workaround by email
Evidence
docs/license/sunvox.txt in sunvox-2.1.4d.zip (2026-09-30): "There are no restrictions on the use of your own content created with this software."
Same file (2026-09-30): "This is freeware, so you may use this software without charge."
Live SunVox page (2026-09-30): "It's free for most platforms, except Android and iOS."
Live library page (2026-09-30): "You can freely use it in your own products (even commercial ones)"