Wiki's maintained by the community

• Official language reference.
• Differences of Objective Pascal.
• iOS Development.
• Building compilers for OS X and iOS.

Other resources

• Ryan's Pascal page which contains various resources.
• Objective Pascal Framework Parser.
• Ingemar's page with source code examples and resources.
• Developing with Objective Pascal articles (and Xcode 4 resources) written by Phil Hess.
• Tutorial on using the Objective-C framework parser script written by Phil Hess.
• Tutorial on compiling static libraries in Pascal then using them in Objective-C projects by Julien Marcel.

Tools

• TextMate Pascal.tmbundle
• Xcode Integration Kit
• Lazarus
• PascalGladiator
• Lightweight IDE page

Support

• Mac Pascal mail list which serves as the official forum for Objective Pascal support.