Build
Instructions for downloading and compiling the Processing software.

Source
View the code for the Processing Core and Environment.

Bugs
The Processing bugs database — a system for reporting bugs, assigning tasks, and requesting features.

Reference
Technical reference for Processing Core and everything else in the JavaDoc style. Includes more technical detail than the reference distributed with the software.

Libraries
Instructions for making Processing Libraries. Libraries extend Processing beyond its core of graphics and image programming into audio, video, communication protocols, etc.

Tools
A Tool is a chunk of code that runs from the Tools menu. Tools can expand the Processing Development Environment without the need to rebuild from the source.

Welcome to dev.processing.org, a space dedicated to contributing code and expertise to the Processing software. This subdomain of Processing.org is provides information to future and current Processing developers. To download Processing, see examples, and learn more, please visit the main site, http://processing.org

Processing is not a corporation. We don't have a full-time staff to create, promote, and improve the software. Please consider donating your time and energy to improvements. In addition to assisting in the software development, there are many other ways to contribute.

Processing is Open Source Software. The PDE (Processing Development Environment) is released under the GNU GPL (General Public License). The export libraries (also known as 'core') are released under the GNU LGPL (Lesser General Public License). There's more information about Processing and Open Source in the FAQ and more information about the GNU GPL and GNU LGPL at opensource.org.