Leylines stands on open-source software. We're grateful to the projects and people below. Each component is used under its own license; the full, unabridged license texts and copyright notices are bundled inside the plugin and shown in its About panel (Plugin settings → About).
In the plugin. Everything below ships inside the VST3/AU/CLAP/Standalone artifacts.
JUCE 8.0.15
License: JUCE 8 licence (Starter tier)
Copyright: © Raw Material Software Limited
The application framework Leylines is built on. JUCE in turn bundles components that ship inside the plugin: the Steinberg VST3 SDK (listed separately below), the Apple AudioUnitSDK (Apache-2.0), HarfBuzz (Old MIT), SheenBidi (Apache-2.0), FLAC and Ogg Vorbis (BSD), and zlib, libpng and libjpeg.
Steinberg VST3 SDK 3.8.0
License: MIT License
Copyright: © 2025 Steinberg Media Technologies GmbH
The VST3 plug-in interfaces, bundled inside JUCE and compiled into the VST3 build. Steinberg relicensed the SDK to MIT from version 3.8.0, and the JUCE 8.0.15 pin bundles 3.8.0. VST® is a registered trademark of Steinberg Media Technologies GmbH.
libopus 1.5.2
License: BSD 3-Clause + royalty-free Opus patent grant
Copyright: © 2001-2023 Xiph.Org Foundation and contributors
Audio encoding.
libdatachannel 0.24.5
License: Mozilla Public License 2.0
Copyright: © Paul-Louis Ageneau and contributors
WebRTC data-channel peer transport, linked statically and unmodified. Bundles libjuice (MPL-2.0), usrsctp (BSD 2-Clause) and plog (MIT) transitively.
libjuice 1.7.2
License: Mozilla Public License 2.0
Copyright: © Paul-Louis Ageneau and contributors
ICE connectivity for the peer transport (working out how two peers can reach each other through NATs). Bundled by libdatachannel, linked statically and unmodified.
usrsctp
License: BSD 2-Clause License
Copyright: © 2015 Randall Stewart and Michael Tuexen
SCTP, the transport the WebRTC data channels run over. Bundled by libdatachannel.
plog 1.1.10
License: MIT License
Copyright: © 2022 Sergey Podobry
Header-only logging, compiled into libdatachannel.
Mbed TLS 3.6.6
License: Apache License 2.0 (upstream is dual-licensed Apache-2.0 OR GPL-2.0-or-later; used under Apache-2.0)
Copyright: © The Mbed TLS Contributors
DTLS cryptography for the peer transport. Includes Project Everest (Apache-2.0) and p256-m (Apache-2.0 OR GPL-2.0-or-later, used under Apache-2.0).
clap-juce-extensions
License: MIT License
Copyright: © 2019-2020 Paul Walker
Produces the CLAP plugin builds.
CLAP 1.2.7
License: MIT License
Copyright: © 2021 Alexandre BIQUE
The CLAP plugin standard itself, with its companion clap-helpers (MIT, © 2021 Alexandre BIQUE). Bundled by clap-juce-extensions.
JetBrains Mono
License: SIL Open Font License 1.1
Copyright: © 2020 The JetBrains Mono Project Authors
Monospace typography.
Inter & DM Mono fonts
License: SIL Open Font License 1.1
Copyright: © The Inter Project Authors; © 2020 The DM Mono Project Authors
Body text (Inter) and the plugin’s monospace UI (DM Mono).
On this website. This site is a static export that serves a compiled JavaScript runtime to your browser. These are the third-party components inside it.
React & React DOM 19.2.7
License: MIT License
Copyright: © Meta Platforms, Inc. and affiliates
The UI runtime this site is built with, along with its scheduler (MIT, same copyright).
Next.js 15.5.19
License: MIT License
Copyright: © Vercel, Inc.
The framework this site is built and statically exported with, along with its styled-jsx and client-only runtime pieces (MIT).
@swc/helpers 0.5.15
License: Apache License 2.0
Copyright: © 강동윤 (kdy1) and SWC contributors
Compiler helper functions inlined into this site’s JavaScript bundles.
@paddle/paddle-js 1.6.4
License: Apache License 2.0
Copyright: © Paddle.com Market Ltd.
Checkout integration.
Missing an attribution or have a question about our open-source use? Email [email protected].