ftp://ftp.uni-hannover.de/pub/mirror/bsd/NetBSD/packages/current-packages/  direct

[DIR]SunOS/  direct  455+ twin directories
[DIR]QNX/  direct  307+ twin directories
[DIR]OpenBSD/  direct  358+ twin directories
[DIR]OSF1/  direct  71 twin directories
[DIR]NetBSD-4.0/  direct  75 twin directories
[DIR]NetBSD/  direct  363+ twin directories
[DIR]Linux/  direct  4362+ twin directories
[DIR]Interix/  direct  59 twin directories
[DIR]IRIX/  direct  326+ twin directories
[DIR]HPUX/  direct  745+ twin directories
[DIR]FreeBSD/  direct  1918+ twin directories
[DIR]DragonFly/  direct  33 twin directories
[DIR]Darwin/  direct  496+ twin directories
[DIR]AIX/  direct  1755+ twin directories
[DIR]NetBSD-5.0/  direct  30 twin directories