You are at the top of the ports tree.
For information on how to use the ports tree, please look at "The Ports Collection" section of the FreeBSD handbook on your own FreeBSD machine or at the FreeBSD web site.
Also, if you would like to contribute a new port or fix an existing one, please refer to the Porting Guidelines section of the most current handbook.
Here are the one-line descriptions for each of the directories:
archivers: Archivers. astro: Astronomical ports. audio: Audio tools. benchmarks: Benchmarking tools. cad: CAD tools. chinese: Chinese support. comms: Communication utilities. converters: Character code converters. databases: Databases. devel: Development utilities. editors: Editors. emulators: Emulators for other operating systems. games: Games. german: German support. graphics: Graphics tools and libraries. japanese: Japanese support. korean: Korean support. lang: Programming languages. mail: Electronic mail utilities. math: Mathematics. mbone: MBone applications. misc: Miscellaneous utilities. net: Networking tools. news: Network news. plan9: Ports taken/borrowed from At&T's Plan9. print: Desktop publishing. russian: Russian support. security: Security tools. shells: Shells. sysutils: System utilities. textproc: Text processing utilities (does not include desktop publishing). vietnamese: Vietnamese support. www: Ports related to the World Wide Web. x11: Ports to support the X window system.