Since the FreeBSD torrent tracker has been taken offline, and it appears that it won’t be coming back, you may be able to use a magnet link, so here they are. Each magnet link announces to three public trackers, to try and increase the size of the swarm.
Current FreeBSD versions
FreeBSD-7.4-RELEASE-amd64-all
FreeBSD-7.4-RELEASE-amd64-bootonly
FreeBSD-7.4-RELEASE-amd64-disc1
FreeBSD-7.4-RELEASE-amd64-disc2
FreeBSD-7.4-RELEASE-amd64-disc3
FreeBSD-7.4-RELEASE-amd64-docs
FreeBSD-7.4-RELEASE-amd64-dvd1
FreeBSD-7.4-RELEASE-amd64-livefs
FreeBSD-7.4-RELEASE-i386-all
FreeBSD-7.4-RELEASE-i386-bootonly
FreeBSD-7.4-RELEASE-i386-disc1
FreeBSD-7.4-RELEASE-i386-disc2
FreeBSD-7.4-RELEASE-i386-disc3
FreeBSD-7.4-RELEASE-i386-docs
FreeBSD-7.4-RELEASE-i386-dvd1
FreeBSD-7.4-RELEASE-i386-livefs
FreeBSD-8.3-RELEASE-amd64-all
FreeBSD-8.3-RELEASE-amd64-bootonly
FreeBSD-8.3-RELEASE-amd64-disc1
FreeBSD-8.3-RELEASE-amd64-dvd1
FreeBSD-8.3-RELEASE-amd64-livefs
FreeBSD-8.3-RELEASE-amd64-memstick
FreeBSD-8.3-RELEASE-i386-all
FreeBSD-8.3-RELEASE-i386-bootonly
FreeBSD-8.3-RELEASE-i386-disc1
FreeBSD-8.3-RELEASE-i386-dvd1
FreeBSD-8.3-RELEASE-i386-livefs
FreeBSD-8.3-RELEASE-i386-memstick
FreeBSD-9.1-RELEASE-amd64-all
FreeBSD-9.1-RELEASE-amd64-bootonly
FreeBSD-9.1-RELEASE-amd64-disc1
FreeBSD-9.1-RELEASE-amd64-dvd1
FreeBSD-9.1-RELEASE-amd64-memstick
FreeBSD-9.1-RELEASE-i386-all
FreeBSD-9.1-RELEASE-i386-bootonly
FreeBSD-9.1-RELEASE-i386-disc1
FreeBSD-9.1-RELEASE-i386-dvd1
FreeBSD-9.1-RELEASE-i386-memstick
FreeBSD-7.4-RELEASE-pc98-all
FreeBSD-7.4-RELEASE-pc98-bootonly
FreeBSD-7.4-RELEASE-pc98-disc1
FreeBSD-7.4-RELEASE-pc98-livefs
FreeBSD-7.4-RELEASE-sparc64-all
FreeBSD-7.4-RELEASE-sparc64-bootonly
FreeBSD-7.4-RELEASE-sparc64-disc1
FreeBSD-7.4-RELEASE-sparc64-disc2
FreeBSD-7.4-RELEASE-sparc64-disc3
FreeBSD-7.4-RELEASE-sparc64-docs
FreeBSD-8.3-RELEASE-pc98-all
FreeBSD-8.3-RELEASE-pc98-bootonly
FreeBSD-8.3-RELEASE-pc98-disc1
FreeBSD-8.3-RELEASE-pc98-livefs
FreeBSD-8.3-RELEASE-sparc64-all
FreeBSD-8.3-RELEASE-sparc64-bootonly
FreeBSD-8.3-RELEASE-sparc64-disc1
FreeBSD-8.3-RELEASE-sparc64-dvd1
FreeBSD-8.3-RELEASE-sparc64-livefs
FreeBSD-9.1-RELEASE-powerpc64-all
FreeBSD-9.1-RELEASE-powerpc64-bootonly
FreeBSD-9.1-RELEASE-powerpc64-memstick
FreeBSD-9.1-RELEASE-powerpc64-release
FreeBSD-9.1-RELEASE-sparc64-all
FreeBSD-9.1-RELEASE-sparc64-bootonly
FreeBSD-9.1-RELEASE-sparc64-disc1
Previous FreeBSD versions
5.5-RELEASE-alpha-all
5.5-RELEASE-alpha-bootonly
5.5-RELEASE-alpha-disc1
5.5-RELEASE-alpha-disc2
5.5-RELEASE-pc98-all
5.5-RELEASE-pc98-disc1
5.5-RELEASE-sparc64-all
5.5-RELEASE-sparc64-bootonly
5.5-RELEASE-sparc64-disc1
5.5-RELEASE-sparc64-disc2
6.1-RELEASE-alpha-all
6.1-RELEASE-alpha-bootonly
6.1-RELEASE-alpha-disc1
6.1-RELEASE-alpha-disc2
6.1-RELEASE-ia64-all
6.1-RELEASE-ia64-bootonly
6.1-RELEASE-ia64-disc1
6.1-RELEASE-ia64-disc2
6.1-RELEASE-ia64-livefs
6.1-RELEASE-pc98-all
6.1-RELEASE-pc98-disc1
6.1-RELEASE-sparc64-all
6.1-RELEASE-sparc64-bootonly
6.1-RELEASE-sparc64-disc1
6.1-RELEASE-sparc64-disc2
6.2-RELEASE-alpha-all
6.2-RELEASE-alpha-bootonly
6.2-RELEASE-alpha-disc1
6.2-RELEASE-alpha-docs
6.2-RELEASE-ia64-all
6.2-RELEASE-ia64-bootonly
6.2-RELEASE-ia64-disc1
6.2-RELEASE-ia64-disc2
6.2-RELEASE-ia64-docs
6.2-RELEASE-ia64-livefs
6.2-RELEASE-pc98-all
6.2-RELEASE-pc98-bootonly
6.2-RELEASE-pc98-disc1
6.2-RELEASE-sparc64-all
6.2-RELEASE-sparc64-bootonly
6.2-RELEASE-sparc64-disc1
6.2-RELEASE-sparc64-disc2
6.2-RELEASE-sparc64-docs
6.3-RELEASE-alpha-all
6.3-RELEASE-alpha-bootonly
6.3-RELEASE-alpha-disc1
6.3-RELEASE-alpha-disc2
6.3-RELEASE-alpha-disc3
6.3-RELEASE-alpha-docs
6.3-RELEASE-pc98-all
6.3-RELEASE-pc98-bootonly
6.3-RELEASE-pc98-disc1
6.3-RELEASE-sparc64-all
6.3-RELEASE-sparc64-bootonly
6.3-RELEASE-sparc64-disc1
6.3-RELEASE-sparc64-disc2
6.3-RELEASE-sparc64-disc3
6.3-RELEASE-sparc64-docs
6.4-RELEASE-pc98-all
6.4-RELEASE-pc98-bootonly
6.4-RELEASE-pc98-disc1
6.4-RELEASE-sparc64-all
6.4-RELEASE-sparc64-bootonly
6.4-RELEASE-sparc64-disc1
6.4-RELEASE-sparc64-docs
7.0-RELEASE-ia64-all
7.0-RELEASE-ia64-bootonly
7.0-RELEASE-ia64-disc1
7.0-RELEASE-ia64-disc2
7.0-RELEASE-ia64-disc3
7.0-RELEASE-ia64-docs
7.0-RELEASE-ia64-livefs
7.0-RELEASE-pc98-all
7.0-RELEASE-pc98-bootonly
7.0-RELEASE-pc98-disc1
7.0-RELEASE-pc98-livefs
7.0-RELEASE-powerpc-all
7.0-RELEASE-powerpc-bootonly
7.0-RELEASE-powerpc-disc1
7.0-RELEASE-powerpc-disc2
7.0-RELEASE-powerpc-disc3
7.0-RELEASE-powerpc-docs
7.1-RELEASE-ia64-all
7.1-RELEASE-ia64-bootonly
7.1-RELEASE-ia64-disc1
7.1-RELEASE-ia64-disc2
7.1-RELEASE-ia64-disc3
7.1-RELEASE-ia64-docs
7.1-RELEASE-ia64-livefs
7.1-RELEASE-pc98-all
7.1-RELEASE-pc98-bootonly
7.1-RELEASE-pc98-disc1
7.1-RELEASE-pc98-livefs
7.1-RELEASE-powerpc-all
7.1-RELEASE-powerpc-bootonly
7.1-RELEASE-powerpc-disc1
7.1-RELEASE-powerpc-disc2
7.1-RELEASE-powerpc-disc3
7.1-RELEASE-powerpc-docs
7.1-RELEASE-sparc64-all
7.1-RELEASE-sparc64-bootonly
7.1-RELEASE-sparc64-disc1
7.1-RELEASE-sparc64-disc2
7.1-RELEASE-sparc64-disc3
7.1-RELEASE-sparc64-docs
7.2-RELEASE-ia64-all
7.2-RELEASE-ia64-bootonly
7.2-RELEASE-ia64-disc1
7.2-RELEASE-ia64-docs
7.2-RELEASE-ia64-livefs
7.2-RELEASE-pc98-all
7.2-RELEASE-pc98-bootonly
7.2-RELEASE-pc98-disc1
7.2-RELEASE-pc98-livefs
7.2-RELEASE-powerpc-all
7.2-RELEASE-powerpc-bootonly
7.2-RELEASE-powerpc-disc1
7.2-RELEASE-powerpc-docs
7.2-RELEASE-sparc64-all
7.2-RELEASE-sparc64-bootonly
7.2-RELEASE-sparc64-disc1
7.2-RELEASE-sparc64-docs
8.0-RELEASE-ia64-all
8.0-RELEASE-ia64-bootonly
8.0-RELEASE-ia64-disc1
8.0-RELEASE-ia64-disc2
8.0-RELEASE-ia64-disc3
8.0-RELEASE-ia64-dvd1
8.0-RELEASE-ia64-livefs
8.0-RELEASE-pc98-all
8.0-RELEASE-pc98-bootonly
8.0-RELEASE-pc98-disc1
8.0-RELEASE-pc98-livefs
8.0-RELEASE-powerpc-all
8.0-RELEASE-powerpc-bootonly
8.0-RELEASE-powerpc-disc1
8.0-RELEASE-powerpc-disc2
8.0-RELEASE-powerpc-disc3
8.0-RELEASE-sparc64-all
8.0-RELEASE-sparc64-bootonly
8.0-RELEASE-sparc64-disc1
8.0-RELEASE-sparc64-dvd1
8.0-RELEASE-sparc64-livefs
8.1-RELEASE-ia64-all
8.1-RELEASE-pc98-all
8.1-RELEASE-powerpc-all
8.1-RELEASE-sparc64-all
FreeBSD-7.3-RELEASE-pc98-all
FreeBSD-7.3-RELEASE-pc98-bootonly
FreeBSD-7.3-RELEASE-pc98-disc1
FreeBSD-7.3-RELEASE-pc98-livefs
FreeBSD-7.3-RELEASE-sparc64-all
FreeBSD-7.3-RELEASE-sparc64-bootonly
FreeBSD-7.3-RELEASE-sparc64-disc1
FreeBSD-7.3-RELEASE-sparc64-disc2
FreeBSD-7.3-RELEASE-sparc64-disc3
FreeBSD-7.3-RELEASE-sparc64-docs
FreeBSD-8.1-RELEASE-ia64-bootonly
FreeBSD-8.1-RELEASE-ia64-disc1
FreeBSD-8.1-RELEASE-ia64-dvd1
FreeBSD-8.1-RELEASE-ia64-livefs
FreeBSD-8.1-RELEASE-pc98-bootonly
FreeBSD-8.1-RELEASE-pc98-disc1
FreeBSD-8.1-RELEASE-pc98-livefs
FreeBSD-8.1-RELEASE-powerpc-bootonly
FreeBSD-8.1-RELEASE-powerpc-disc1
FreeBSD-8.1-RELEASE-sparc64-bootonly
FreeBSD-8.1-RELEASE-sparc64-disc1
FreeBSD-8.1-RELEASE-sparc64-dvd1
FreeBSD-8.1-RELEASE-sparc64-livefs
FreeBSD-8.2-RELEASE-ia64-all
FreeBSD-8.2-RELEASE-ia64-bootonly
FreeBSD-8.2-RELEASE-ia64-disc1
FreeBSD-8.2-RELEASE-ia64-dvd1
FreeBSD-8.2-RELEASE-ia64-livefs
FreeBSD-8.2-RELEASE-pc98-all
FreeBSD-8.2-RELEASE-pc98-bootonly
FreeBSD-8.2-RELEASE-pc98-disc1
FreeBSD-8.2-RELEASE-pc98-livefs
FreeBSD-8.2-RELEASE-powerpc-all
FreeBSD-8.2-RELEASE-powerpc-bootonly
FreeBSD-8.2-RELEASE-powerpc-disc1
FreeBSD-8.2-RELEASE-powerpc-livefs
FreeBSD-8.2-RELEASE-sparc64-all
FreeBSD-8.2-RELEASE-sparc64-bootonly
FreeBSD-8.2-RELEASE-sparc64-disc1
FreeBSD-8.2-RELEASE-sparc64-dvd1
FreeBSD-8.2-RELEASE-sparc64-livefs
FreeBSD-9.0-RELEASE-ia64-all
FreeBSD-9.0-RELEASE-ia64-bootonly
FreeBSD-9.0-RELEASE-ia64-memstick
FreeBSD-9.0-RELEASE-ia64-release
FreeBSD-9.0-RELEASE-powerpc-all
FreeBSD-9.0-RELEASE-powerpc-bootonly
FreeBSD-9.0-RELEASE-powerpc-memstick
FreeBSD-9.0-RELEASE-powerpc-release
FreeBSD-9.0-RELEASE-powerpc64-all
FreeBSD-9.0-RELEASE-powerpc64-bootonly
FreeBSD-9.0-RELEASE-powerpc64-memstick
FreeBSD-9.0-RELEASE-powerpc64-release
FreeBSD-9.0-RELEASE-sparc64-all
FreeBSD-9.0-RELEASE-sparc64-bootonly
FreeBSD-9.0-RELEASE-sparc64-disc1
5.5-RELEASE-amd64-all
5.5-RELEASE-amd64-bootonly
5.5-RELEASE-amd64-disc1
5.5-RELEASE-amd64-disc2
5.5-RELEASE-i386-all
5.5-RELEASE-i386-bootonly
5.5-RELEASE-i386-disc1
5.5-RELEASE-i386-disc2
6.1-RELEASE-amd64-all
6.1-RELEASE-amd64-bootonly
6.1-RELEASE-amd64-disc1
6.1-RELEASE-amd64-disc2
6.1-RELEASE-i386-all
6.1-RELEASE-i386-bootonly
6.1-RELEASE-i386-disc1
6.1-RELEASE-i386-disc2
6.2-RELEASE-amd64-all
6.2-RELEASE-amd64-bootonly
6.2-RELEASE-amd64-disc1
6.2-RELEASE-amd64-disc2
6.2-RELEASE-amd64-docs
6.2-RELEASE-i386-all
6.2-RELEASE-i386-bootonly
6.2-RELEASE-i386-disc1
6.2-RELEASE-i386-disc2
6.2-RELEASE-i386-docs
6.3-RELEASE-amd64-all
6.3-RELEASE-amd64-bootonly
6.3-RELEASE-amd64-disc1
6.3-RELEASE-amd64-disc2
6.3-RELEASE-amd64-disc3
6.3-RELEASE-amd64-docs
6.3-RELEASE-i386-all
6.3-RELEASE-i386-bootonly
6.3-RELEASE-i386-disc1
6.3-RELEASE-i386-disc2
6.3-RELEASE-i386-disc3
6.3-RELEASE-i386-docs
6.4-RELEASE-amd64-all
6.4-RELEASE-amd64-bootonly
6.4-RELEASE-amd64-disc1
6.4-RELEASE-amd64-disc2
6.4-RELEASE-amd64-disc3
6.4-RELEASE-amd64-docs
6.4-RELEASE-i386-all
6.4-RELEASE-i386-bootonly
6.4-RELEASE-i386-disc1
6.4-RELEASE-i386-disc2
6.4-RELEASE-i386-disc3
6.4-RELEASE-i386-docs
7.0-RELEASE-amd64-all
7.0-RELEASE-amd64-bootonly
7.0-RELEASE-amd64-disc1
7.0-RELEASE-amd64-disc2
7.0-RELEASE-amd64-disc3
7.0-RELEASE-amd64-docs
7.0-RELEASE-amd64-livefs
7.0-RELEASE-i386-all
7.0-RELEASE-i386-bootonly
7.0-RELEASE-i386-disc1
7.0-RELEASE-i386-disc2
7.0-RELEASE-i386-disc3
7.0-RELEASE-i386-docs
7.0-RELEASE-i386-livefs
7.1-RELEASE-amd64-all
7.1-RELEASE-amd64-bootonly
7.1-RELEASE-amd64-disc1
7.1-RELEASE-amd64-disc2
7.1-RELEASE-amd64-disc3
7.1-RELEASE-amd64-docs
7.1-RELEASE-amd64-dvd1
7.1-RELEASE-amd64-livefs
7.1-RELEASE-i386-allv
7.1-RELEASE-i386-bootonly
7.1-RELEASE-i386-disc1
7.1-RELEASE-i386-disc2
7.1-RELEASE-i386-disc3
7.1-RELEASE-i386-docs
7.1-RELEASE-i386-dvd1
7.1-RELEASE-i386-livefs
7.2-RELEASE-amd64-all
7.2-RELEASE-amd64-bootonly
7.2-RELEASE-amd64-disc1
7.2-RELEASE-amd64-disc2
7.2-RELEASE-amd64-disc3
7.2-RELEASE-amd64-docs
7.2-RELEASE-amd64-dvd1
7.2-RELEASE-amd64-livefs
7.2-RELEASE-i386-all
7.2-RELEASE-i386-bootonly
7.2-RELEASE-i386-disc1
7.2-RELEASE-i386-disc2
7.2-RELEASE-i386-disc3
7.2-RELEASE-i386-docs
7.2-RELEASE-i386-dvd1
7.2-RELEASE-i386-livefs
8.0-RELEASE-amd64-all
8.0-RELEASE-amd64-bootonly
8.0-RELEASE-amd64-disc1
8.0-RELEASE-amd64-dvd1
8.0-RELEASE-amd64-livefs
8.0-RELEASE-amd64-memstick
8.0-RELEASE-i386-all
8.0-RELEASE-i386-bootonly
8.0-RELEASE-i386-disc1
8.0-RELEASE-i386-dvd1
8.0-RELEASE-i386-livefs
8.0-RELEASE-i386-memstick
8.1-RELEASE-amd64-all
8.1-RELEASE-i386-all
FreeBSD-7.3-RELEASE-amd64-all
FreeBSD-7.3-RELEASE-amd64-bootonly
FreeBSD-7.3-RELEASE-amd64-disc1
FreeBSD-7.3-RELEASE-amd64-disc2
FreeBSD-7.3-RELEASE-amd64-disc3
FreeBSD-7.3-RELEASE-amd64-docs
FreeBSD-7.3-RELEASE-amd64-dvd1
FreeBSD-7.3-RELEASE-amd64-livefs
FreeBSD-7.3-RELEASE-i386-all
FreeBSD-7.3-RELEASE-i386-bootonly
FreeBSD-7.3-RELEASE-i386-disc1
FreeBSD-7.3-RELEASE-i386-disc2
FreeBSD-7.3-RELEASE-i386-disc3
FreeBSD-7.3-RELEASE-i386-docs
FreeBSD-7.3-RELEASE-i386-dvd1
FreeBSD-7.3-RELEASE-i386-livefs
FreeBSD-8.1-RELEASE-amd64-bootonly
FreeBSD-8.1-RELEASE-amd64-disc1
FreeBSD-8.1-RELEASE-amd64-dvd1
FreeBSD-8.1-RELEASE-amd64-livefs
FreeBSD-8.1-RELEASE-amd64-memstick
FreeBSD-8.1-RELEASE-i386-bootonly
FreeBSD-8.1-RELEASE-i386-disc1
FreeBSD-8.1-RELEASE-i386-dvd1
FreeBSD-8.1-RELEASE-i386-livefs
FreeBSD-8.1-RELEASE-i386-memstick
FreeBSD-8.2-RELEASE-amd64-all
FreeBSD-8.2-RELEASE-amd64-bootonly
FreeBSD-8.2-RELEASE-amd64-disc1
FreeBSD-8.2-RELEASE-amd64-dvd1
FreeBSD-8.2-RELEASE-amd64-livefs
FreeBSD-8.2-RELEASE-amd64-memstick
FreeBSD-8.2-RELEASE-i386-all
FreeBSD-8.2-RELEASE-i386-bootonly
FreeBSD-8.2-RELEASE-i386-disc1
FreeBSD-8.2-RELEASE-i386-dvd1
FreeBSD-8.2-RELEASE-i386-livefs
FreeBSD-8.2-RELEASE-i386-memstick
FreeBSD-9.0-RELEASE-amd64-all
FreeBSD-9.0-RELEASE-amd64-bootonly
FreeBSD-9.0-RELEASE-amd64-disc1
FreeBSD-9.0-RELEASE-amd64-dvd1
FreeBSD-9.0-RELEASE-amd64-memstick
FreeBSD-9.0-RELEASE-i386-all
FreeBSD-9.0-RELEASE-i386-bootonly
FreeBSD-9.0-RELEASE-i386-disc1
FreeBSD-9.0-RELEASE-i386-dvd1
FreeBSD-9.0-RELEASE-i386-memstick