ftp://ftp.uni-hannover.de/pub/mirror/bsd/FreeBSD/development/FreeBSD-CVS/src/sys/  direct

[DIR]xen/  direct  10348+ twin directories
[DIR]xdr/  direct  735+ twin directories
[DIR]vm/  direct  8665+ twin directories
[DIR]ufs/  direct  5029+ twin directories
[DIR]tools/  direct  51106+ twin directories
[DIR]sys/  direct  35874+ twin directories
[DIR]svr4/  direct  1393+ twin directories
[DIR]security/  direct  25950+ twin directories
[DIR]scsi/  direct  13601+ twin directories
[DIR]rpc/  direct  6737+ twin directories
[DIR]posix4/  direct  165 twin directories
[DIR]pci/  direct  25172+ twin directories
[DIR]pccard/  direct  1134+ twin directories
[DIR]opencrypto/  direct  291+ twin directories
[DIR]nwfs/  direct  419+ twin directories
[DIR]ntfs/  direct  3799+ twin directories
[DIR]nlm/  direct  1329+ twin directories
[DIR]nfsserver/  direct  304+ twin directories
[DIR]nfsclient/  direct  298+ twin directories
[DIR]nfs4client/  direct  212+ twin directories
[DIR]nfs/  direct  7274+ twin directories
[DIR]netsmb/  direct  601+ twin directories
[DIR]netns/  direct  571+ twin directories
[DIR]netncp/  direct  146 twin directories
[DIR]netnatm/  direct  496+ twin directories
[DIR]netkey/  direct  387+ twin directories
[DIR]netiso/  direct  329+ twin directories
[DIR]netipx/  direct  407+ twin directories
[DIR]netipsec/  direct  325+ twin directories
[DIR]netinet6/  direct  598+ twin directories
[DIR]netinet/  direct  4636+ twin directories
[DIR]netgraph/  direct  595+ twin directories
[DIR]netccitt/  direct  235+ twin directories
[DIR]netatm/  direct  148 twin directories
[DIR]netatalk/  direct  3608+ twin directories
[DIR]net80211/  direct  584+ twin directories
[DIR]net/  direct  42891+ twin directories
[DIR]msdosfs/  direct  1078+ twin directories
[DIR]modules/  direct  65535+ twin directories
[DIR]miscfs/  direct  531+ twin directories
[DIR]mips/  direct  14512+ twin directories
[DIR]libkern/  direct  603+ twin directories
[DIR]kern/  direct  954+ twin directories
[DIR]isofs/  direct  2364+ twin directories
[DIR]isa/  direct  7581+ twin directories
[DIR]i4b/  direct  257+ twin directories
[DIR]i386/  direct  65535+ twin directories
[DIR]hwpmc/  direct  487+ twin directories
[DIR]gnu/  direct  4257+ twin directories
[DIR]geom/  direct  1152+ twin directories