Twin directories of sf:

[DIR]  ftp://ftp.gfz-potsdam.de/pub/home/sf/
[DIR]  ftp://ftp.reed.edu/mirrors/faqs/de-buecher/sf/
[DIR]  ftp://ftp.reed.edu/mirrors/faqs/sf/
[DIR]  ftp://ftp.internat.freebsd.org/pub/FreeBSD/ports/local-distfiles/sf/
[DIR]  ftp://ftp.skynet.be/mirror2/suse.com/people/sf/
[DIR]  ftp://ftp.cs.toronto.edu/pub/shou/Research/javaBDD/javabdd_0.6/JavaBDD/javadoc/org/sf/
[DIR]  ftp://ftp.cs.toronto.edu/pub/shou/Research/javaBDD/javabdd_src/JavaBDD/org/sf/
[DIR]  ftp://ftp.cs.toronto.edu/pub/usenet/news.answers/de-buecher/sf/
[DIR]  ftp://ftp.ifi.unizh.ch/pub/security/sf/
[DIR]  ftp://ftp.uni-hannover.de/pub/mirror/bsd/FreeBSD/ports/local-distfiles/sf/
[DIR]  ftp://ftp.uni-hannover.de/pub/mirror/bsd/FreeBSD/development/FreeBSD-CVS/src/sys/dev/sf/
[DIR]  ftp://ftp.uni-hannover.de/pub/mirror/bsd/FreeBSD/development/FreeBSD-CVS/src/sys/modules/sf/
[DIR]  ftp://ftp.uni-hannover.de/pub/mirror/bsd/NetBSD/misc/dmcmahill/pkgstat/2004-04-25-alpha/leftovers-alpha/usr/pkg/share/dpbox/conf/sf/
[DIR]  ftp://ftp.wh8.tu-dresden.de/pub/cert.dfn/tools/net/packet_screen/sf/
[DIR]  ftp://ftp.swin.edu.au/freebsd/ports/local-distfiles/sf/
[DIR]  ftp://ftp.swin.edu.au/freebsd/development/FreeBSD-CVS/src/sys/dev/sf/
[DIR]  ftp://ftp.swin.edu.au/freebsd/development/FreeBSD-CVS/src/sys/modules/sf/
[DIR]  ftp://ftp.cyf-kr.edu.pl/pub/mirror/usenet/misc.answers/sf/
[DIR]  ftp://ftp.cyf-kr.edu.pl/pub/mirror/usenet/news.answers/de-buecher/sf/
[DIR]  ftp://ftp.cyf-kr.edu.pl/pub/mirror/usenet/news.answers/sf/
[DIR]  ftp://ftp.cyf-kr.edu.pl/pub/mirror/usenet/rec.answers/sf/
[DIR]  ftp://ftp.cyf-kr.edu.pl/pub/mirror/usenet/alt.answers/sf/
[DIR]  ftp://ftp.cyf-kr.edu.pl/pub/mirror/usenet/de.answers/de-buecher/sf/
[DIR]  ftp://sapi.vlsm.org/.1/leaf/devel/thc/dox/sf/
[DIR]  ftp://ftp.sk.freebsd.org/pub/FreeBSD/ports/local-distfiles/sf/
[DIR]  ftp://ftp.sk.freebsd.org/pub/FreeBSD/development/FreeBSD-CVS/src/sys/dev/sf/
[DIR]  ftp://ftp.sk.freebsd.org/pub/FreeBSD/development/FreeBSD-CVS/src/sys/modules/sf/
[DIR]  ftp://ftp.whtech.com/magazines/advertisements/sf/
[DIR]  ftp://ftp.powerstationbbs.ca/pub/backbone/sf/
[DIR]  ftp://ftp.ps.pl/dsk0/ftp.freebsd.org/FreeBSD/ports/local-distfiles/sf/
[DIR]  ftp://ftp.free.fr/.mirrors1/ftp.freebsd.org/ports/local-distfiles/sf/
[DIR]  ftp://ftp.free.fr/.mirrors1/ftp.freebsd.org/development/FreeBSD-CVS/src/sys/dev/sf/
[DIR]  ftp://ftp.free.fr/.mirrors1/ftp.freebsd.org/development/FreeBSD-CVS/src/sys/modules/sf/
pkg://Colour-ls-NL.html.tar.gz:6767/Colorer-take5.beta2/src/net.sf.colorer/src/net/  downloads[DIR]3  Colour-ls-NL.html.tar.gz/Colorer-take5.beta2/src/net.sf.colorer/src/net/sf/
pkg://Colour-ls-NL.html.tar.gz:6767/Colorer-take5.beta2/doc/java/net/  downloads[DIR]3  Colour-ls-NL.html.tar.gz/Colorer-take5.beta2/doc/java/net/sf/
[DIR]  ftp://ftp.dc.aleron.net/pub/FreeBSD/development/FreeBSD-CVS/src/crypto/openssl/sf/
[DIR]  ftp://ftp.dc.aleron.net/pub/FreeBSD/development/FreeBSD-CVS/src/sys/dev/sf/
[DIR]  ftp://ftp.dc.aleron.net/pub/FreeBSD/development/FreeBSD-CVS/src/sys/modules/sf/
[DIR]  ftp://ftp.cse.buffalo.edu/mirror/BSD/FreeBSD/ports/local-distfiles/sf/
[DIR]  ftp://ftp.cse.buffalo.edu/mirror/BSD/FreeBSD/development/FreeBSD-CVS/src/sys/dev/sf/
[DIR]  ftp://ftp.cse.buffalo.edu/mirror/BSD/FreeBSD/development/FreeBSD-CVS/src/sys/modules/sf/
pkg://Jabber-Component-Proxy-0.01.tar.gz:3490/jabref-1.7.1/src/java/tests/net/  downloads[DIR]3  Jabber-Component-Proxy-0.01.tar.gz/jabref-1.7.1/src/java/tests/net/sf/
pkg://Jabber-Component-Proxy-0.01.tar.gz:3490/jabref-1.7.1/src/java/net/  downloads[DIR]3  Jabber-Component-Proxy-0.01.tar.gz/jabref-1.7.1/src/java/net/sf/
[DIR]  ftp://ftp13.freebsd.org/pub/FreeBSD/ports/local-distfiles/sf/
[DIR]  ftp://ftp13.freebsd.org/pub/FreeBSD/development/FreeBSD-CVS/src/sys/dev/sf/
[DIR]  ftp://ftp13.freebsd.org/pub/FreeBSD/development/FreeBSD-CVS/src/sys/modules/sf/
pkg://Math-GSL-0.09_02.tar.gz:1367015/Math-GSL-0.05_01/examples/  downloads[DIR]3  Math-GSL-0.09_02.tar.gz/Math-GSL-0.05_01/examples/sf/
pkg://Math-GammaFunction-0.02.tar.gz:38253/Math-GSL-0.09_02/examples/  downloads[DIR]3  Math-GammaFunction-0.02.tar.gz/Math-GSL-0.09_02/examples/sf/
[DIR]  ftp://ftp13.freebsd.org/cvsup/ncvs/src/sys/dev/sf/
[DIR]  ftp://ftp13.freebsd.org/cvsup/ncvs/src/sys/modules/sf/