Acknowledgements

Outerline is built with the help of open source software and freely licensed assets. We're grateful to the developers and designers behind these projects.

Fonts

Licensed under the SIL Open Font License 1.1.

• Geist © 2024 The Geist Project Authors · Source
• Geist Mono © 2024 The Geist Project Authors · Source
• Geist Pixel © 2026 The Geist Pixel Project Authors · Source
• Source Code Pro © 2023 Adobe · Source
• Literata © 2017 The Literata Project Authors · Source

JavaScript

• Defuddle0.19.3 © 2025 Steph Ango (@kepano) · MIT License · Source
• mathml-to-latex1.8.0 © 2020 Alexandre Nunes · MIT License · Source
• Temml0.13.3 © 2020 Ron Kok · MIT License · Source
• Turndown7.2.0 © 2017 Dom Christie · MIT License · Source
• @xmldom/xmldom0.9.10 © 2012–present xmldom contributors · MIT License · Source
• Mermaid11.16.0 native / 11.12.2 web © 2014–2022 Knut Sveidqvist · MIT License · Source

Swift Packages

MIT License

• swift-markdown-ui2.4.1 © 2020 Guillermo Gonzalez · Source
• NetworkImage6.0.1 © 2020 Guille Gonzalez · Source
• eventsource1.5.1 © 2025 Mattt · Source

Apache License 2.0

• swift-markdown0.8.0 Apple · Source
• swift-atomics1.3.1 Apple · Source
• swift-collections1.6.0 Apple · Source
• swift-log1.15.1 Apple · Source
• swift-nio2.101.3 Apple · Source
• swift-system1.8.1 Apple · Source

Apache License 2.0 and MIT License

• swift-sdk0.12.1 Model Context Protocol · Source

MIT and BSD 3-Clause Licenses

• HighlighterSwift3.1.0 © 2026 Tony Smith, with Highlight.js 11.11.1 · Source

BSD 2-Clause and MIT Licenses

• swift-cmark0.8.0 © 2014 John MacFarlane and bundled component authors · Source