Apple was the first major computer company to make Open Source development
a key part of its software strategy, and continues to both use and release significant
quantities of open source software.
Bonjour
Bonjour, also known as zero-configuration networking, enables automatic discovery of computers, devices, and services on IP networks using industry standard IP protocols. It is a key component of Apple applications (e.g., iTunes, iPhoto), services (e.g., MobileMe) and devices (e.g., Apple TV, and Airport). Developers can easily leverage Bonjour from both Mac OS X and iOS.
View Reference Documentation
Source Code
Bonjour is not only based on open Internet standards, our implementation is available as Open Source under the Apache 2.0 license. It is built into most modern printers and many other consumer products.
Windows
Bonjour is also available for Windows, both as an end-user tool for printer discovery and an SDK allowing developers to distribute Bonjour as part of their application.
Java
Mac OS X comes complete with a fully configured and ready-to-use standard Java environment for running Java Applets through the Safari browser, or for development with the complete Java Development Kit (JDK). Nothing to download, it all just works when you crack the lid of a new Mac, and Java is regularly updated as part of Apple’s Software Update. With support from popular open source IDEs such as Eclipse or NetBeans, the Mac is a great platform for running and developing Java applications. View Reference Documentation
Unix
The most widely-sold UNIX operating system, Mac OS X combines a fully-conformant UNIX foundation with the richness and usability of the Macintosh interface. View Reference Documentation
WebKit
WebKit is the open source web browser engine at the heart of Apple's Safari web browser on Mac, Windows, and iOS. It also provides a system-level framework engine that powers Dashboard, Mail, and many other Mac OS X applications. Webkit Open Source Project
Apple Open Source
Download open source projects for Mac OS X, iOS, and Developer Tools
Open Source in Mac OS X
Learn about the 200+ open source projects that ship with Mac OS X
Mac OS Forge
Open development of select Mac OS X projects
Additional Reference Documentation
A collection of useful documents about open source
