Apple: Mac OS X: The Apple Mac OS X product page. Describes features in the current version of Mac OS X, a screenshot gallery, latest software downloads, and a directory of resources.
Aquafiles: Collection of OS X software and a message board.
DeXtop Group: Themes, icons, and desktops for Mac OS X.
High Performance Computing on Mac OS X: Collection of tools and information for scientific computation on Mac OS X including Fortran (g77, g95, HPF), MPI, OpenMP, Cactus, Globus, and RNPL among others.
HyperJeff's OS X Page: Features a large list of native OS X software, and essays on software installation.
Mac OS X - Downloads: Directory of freeware, shareware, and commercial software available for download or purchase.
Mac OS X Apps for Power Users and Unix Switchers: A compilation of Mac OS X applications to help users get the most power out of OS X and replicate functionality found in other Unix environments.
Mac OS X Notes: For OS X users looking to delve into the deeper workings of UNIX. Filled with info on compiling open-source software on OS X (10.2) using the Terminal application.
Mac OS X Security: Security issues and advisories. Locate security vulnerability and published hack reports for the new operating system.
MacEnterprise.org: (Formerly macosxlabs.org) A community of IT professionals sharing information and solutions to support Macs in an enterprise.
MacUpdate OSX Software & Games: Directory of OSX freeware, shareware and commercial products.
Max OSX Guru: Tips for tuning and running Darwin and Apple's OSX.
Modified Oroborus for Mac OS X: Rootless window server to run Linux applications. Includes downloads, version history, and screenshots.
OS X for Legacy Macs: Allows the installation of Mac OS X and Darwin on unsupported Macs including the 7300 through 9600 from an unmodified Install CD. Includes a tech support forum and FAQ.
Stepwise: News stories, tutorials, resources for Objective-C programmers using, or wanting to learn more about, Mac OS X's Cocoa environment. Also covers OpenStep and Web Objects programming.
Versiontracker Software Updates: Comprehensive daily list of updates for Mac OS X software.