Browse Square's open source libraries and tools for developers, featuring projects in Java, Android, iOS, and more, all contributed to the community.
Explore Square's open source developer libraries
Square Open Source is a collection of libraries and tools that Square has developed and shared with the broader developer community. The site showcases projects covering a wide range of programming languages, including Java, Kotlin, Android, iOS, and more.
You can browse through these open source resources, learn about how they work, and use them in your own projects. Whether you're building apps or contributing to open source, you'll find high-quality code and active links to related documentation and communities.
If you're a developer looking for trusted, production-ready libraries or just want to see how Square approaches open source, this is a great place to discover, learn, and get involved.
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