Twin directories of units:

[DIR]  ftp://ftp.linux.it/ubuntu/pool/universe/u/units/
[DIR]  ftp://ftp.linux.it/debian/pool/main/u/units/
[DIR]  ftp://134.121.1.1/.snapshot/nightly.3/pub/gnu/units/
[DIR]  ftp://134.121.1.1/pub/gnu.OLD/units/
[DIR]  ftp://134.121.1.1/.snapshot/nightly.2/pub/gnu/units/
[DIR]  ftp://134.121.1.1/.snapshot/nightly.1/pub/gnu/units/
[DIR]  ftp://134.121.1.1/.snapshot/nightly.0/pub/gnu/units/
[DIR]  ftp://134.121.1.1/.snapshot/hourly.1/pub/gnu/units/
[DIR]  ftp://ftp.cesca.es/mirror2/gnu/units/
[DIR]  ftp://ftp.cesca.es/mirror/debian/pool/main/u/units/
[DIR]  ftp://ftp.uni-frankfurt.de/pub/Mirrors3/debian.org/debian/pool/main/u/units/
[DIR]  ftp://ftp.inf.utfsm.cl/pub/tex-archive/macros/latex/contrib/units/
[DIR]  ftp://ftp.inf.utfsm.cl/pub/gnu/units/
[DIR]  ftp://ftp.uni-magdeburg.de/pub/mirror/linux/debian/pool/main/u/units/
[DIR]  ftp://ftp.psg.com/pub/modula-2/gpm/bruce/units/
[DIR]  ftp://ftp.hpl.hp.com/gatekeeper/pub/cygwin/release/units/
[DIR]  ftp://aeneas.mit.edu/pub/gnu/units/
[DIR]  ftp://debian.lcs.mit.edu/pub/debian-amd64/debian-amd64/pool/main/u/units/
[DIR]  ftp://debian.lcs.mit.edu/pub/debian-amd64/debian/pool/main/u/units/
[DIR]  ftp://debian.lcs.mit.edu/debian/pool/main/u/units/
[DIR]  ftp://ftp.kfki.hu/pub/linux/ubuntu/pool/universe/u/units/
[DIR]  ftp://ftp.kfki.hu/pub/linux/debian/pool/main/u/units/
[DIR]  ftp://ftp.internat.freebsd.org/pub/FreeBSD/ports/math/units/
[DIR]  ftp://ftp.dot.state.tx.us/pub/txdot-info/isd/geopakv8/units/
[DIR]  ftp://ftp.skynet.be/mirror1/debian.org/pool/main/u/units/
[DIR]  ftp://ftp.kreonet.re.kr/CTAN/macros/latex/contrib/units/
[DIR]  ftp://ftp.kreonet.re.kr/gnu/ibiblio/www/savannah-checkouts/non-gnu/vgplay/diplomacy/units/
[DIR]  ftp://ftp.kreonet.re.kr/gnu/ibiblio/www/savannah-checkouts/non-gnu/units/
[DIR]  ftp://ftp.kreonet.re.kr/gnu/ibiblio/www/software/units/
[DIR]  ftp://ftp.kreonet.re.kr/gnu/ibiblio/www/savannah-checkouts/gnu/units/units/
[DIR]  ftp://ftp.kreonet.re.kr/gnu/ibiblio/www/savannah-checkouts/gnu/www/software/units/
[DIR]  ftp://ftp.kreonet.re.kr/gnu/ibiblio/www/savannah-checkouts/gnu/units/
[DIR]  ftp://ftp.kreonet.re.kr/gnu/ibiblio/ftp/gnu/units/
[DIR]  ftp://ftp.kreonet.re.kr/OS/cygwin/release/units/
[DIR]  ftp://ftp.kreonet.re.kr/OS/cygwin/release-2/units/
[DIR]  ftp://ftp.prz.rzeszow.pl/pub/gentoo/portage/sci-calculators/units/
[DIR]  ftp://ftp.prz.rzeszow.pl/pub/debian/pool/main/u/units/
[DIR]  ftp://ftp.fagskolen.gjovik.no/pub/cygwin/release-2/units/
[DIR]  ftp://ftp.fagskolen.gjovik.no/pub/cygwin/release/units/
[DIR]  ftp://ftp.3logic.net/.1/debian-archive/pool/main/u/units/
[DIR]  ftp://ftp.3logic.net/.1/debian/pool/main/u/units/
[DIR]  ftp://ftp.uic.nnov.ru/pub/Linux/Debian/debian/pool/main/u/units/
[DIR]  ftp://ftp.uic.nnov.ru/pub/Linux/Debian/debian-amd64/pool/main/u/units/
[DIR]  ftp://ftp.wustl.edu/pub/linux/distributions/debian/pool/main/u/units/
[DIR]  ftp://ftp.nz.debian.org/ubuntu/pool/universe/u/units/
[DIR]  ftp://ftp.nz.debian.org/debian/pool/main/u/units/
[DIR]  ftp://ftp.nz.debian.org/gentoo-x86-portage/sci-calculators/units/
[DIR]  ftp://ftp.uni-stuttgart.de/pub/mirror/ftp.de.debian.org/debian/pool/main/u/units/
[DIR]  ftp://ftp.jyu.fi/pub/mirrors/ftp.debian.org/debian/pool/main/u/units/
[DIR]  ftp://ftp.mcs.vuw.ac.nz/_mnt/archive/comp/sources/misc/volume38/units/