Twin directories of ping:

[DIR]  ftp://ftp.mimuw.edu.pl/People/kedar/SIK2006/cw11-raw/ping/
[DIR]  ftp://ftp.mimuw.edu.pl/People/kedar/cw11-raw/ping/
[DIR]  ftp://ftp.cesca.es/mirror2/softcatala/softcatala/dotclear/plugins/ping/
[DIR]  ftp://ftp.kreonet.re.kr/OS/cygwin/release/ping/
[DIR]  ftp://ftp.kreonet.re.kr/OS/cygwin/release-2/ping/
[DIR]  ftp://ftp.cac.psu.edu/pub/access/cd/windows/utils/ping/
[DIR]  ftp://ftp.fagskolen.gjovik.no/pub/cygwin/release-2/ping/
[DIR]  ftp://ftp.fagskolen.gjovik.no/pub/cygwin/release/ping/
[DIR]  ftp://ftp.uni-hannover.de/pub/mirror/bsd/FreeBSD/development/FreeBSD-CVS/src/sbin/ping/
[DIR]  ftp://ftp.uni-hannover.de/pub/mirror/bsd/NetBSD/NetBSD-release-4-0/src/sbin/ping/
[DIR]  ftp://ftp.uni-hannover.de/pub/mirror/bsd/NetBSD/NetBSD-current/src/sbin/ping/
[DIR]  ftp://ftp.cs.ubc.ca/local/hsh2006/PACKAGES/Development_Tools/Cygwin/release/ping/
[DIR]  ftp://ftp.cs.ubc.ca/local/hsh2007/Packages/Development_Tools/Cygwin/release/ping/
[DIR]  ftp://ftp.swin.edu.au/freebsd/development/FreeBSD-CVS/src/sbin/ping/
[DIR]  ftp://sapi.vlsm.org/.1/cygwin/release/ping/
[DIR]  ftp://sapi.vlsm.org/.1/cygwin/release-2/ping/
[DIR]  ftp://ftp.sk.freebsd.org/pub/NetBSD/NetBSD-release-4-0/src/sbin/ping/
[DIR]  ftp://ftp.sk.freebsd.org/pub/NetBSD/NetBSD-release-3-1/src/sbin/ping/
[DIR]  ftp://ftp.sk.freebsd.org/pub/NetBSD/NetBSD-release-3-0/src/sbin/ping/
[DIR]  ftp://ftp.sk.freebsd.org/pub/NetBSD/NetBSD-current/src/sbin/ping/
[DIR]  ftp://ftp.sk.freebsd.org/pub/FreeBSD/development/FreeBSD-CVS/src/sbin/ping/
[DIR]  ftp://ftp.nnov.net/pub/mirrors/sources.redhat.com/cygwin/release/ping/
[DIR]  ftp://ftp.ps.pl/dsk0/papa.indstate.edu/winsock-l/ping/
[DIR]  ftp://ftp.ps.pl/dsk0/ftp.openbsd.org/src/sbin/ping/
[DIR]  ftp://ftp.ps.pl/dsk0/cygwin/release-2/ping/
[DIR]  ftp://ftp.ps.pl/dsk0/cygwin/release/ping/
pkg://ACE+TAO+CIAO-5.6.1.tar.bz2:24590534/ACE_wrappers/protocols/tests/HTBP/  downloads[DIR]3  ACE+TAO+CIAO-5.6.1.tar.bz2/ACE_wrappers/protocols/tests/HTBP/ping/
pkg://ACE+TAO-5.6.1.tar.bz2:20388344/ACE_wrappers/protocols/tests/HTBP/  downloads[DIR]3  ACE+TAO-5.6.1.tar.bz2/ACE_wrappers/protocols/tests/HTBP/ping/
pkg://ACE+TAO-5.6.5.tar.bz2:23736201/ACE_wrappers/protocols/tests/HTBP/  downloads[DIR]3  ACE+TAO-5.6.5.tar.bz2/ACE_wrappers/protocols/tests/HTBP/ping/
pkg://ACE-5.1-1.i386.rpm:2108228/ACE_wrappers/protocols/tests/HTBP/  info  downloads[DIR]3  ACE-5.1-1.i386.rpm/ACE_wrappers/protocols/tests/HTBP/ping/
pkg://ACE-5.5.1.tar.bz2:7668877/ACE_wrappers/tests/HTBP/  downloads[DIR]3  ACE-5.5.1.tar.bz2/ACE_wrappers/tests/HTBP/ping/
pkg://ACE-5.5.2.tar.bz2:7495797/ACE_wrappers/tests/HTBP/  downloads[DIR]3  ACE-5.5.2.tar.bz2/ACE_wrappers/tests/HTBP/ping/
pkg://ACE-5.5.tar.bz2:7595626/ACE_wrappers/protocols/tests/HTBP/  downloads[DIR]3  ACE-5.5.tar.bz2/ACE_wrappers/protocols/tests/HTBP/ping/
pkg://ACE-5.6.1.tar.bz2:7907583/ACE_wrappers/tests/HTBP/  downloads[DIR]3  ACE-5.6.1.tar.bz2/ACE_wrappers/tests/HTBP/ping/
pkg://ACE-5.6.5.tar.bz2:8901969/ACE_wrappers/protocols/tests/HTBP/  downloads[DIR]3  ACE-5.6.5.tar.bz2/ACE_wrappers/protocols/tests/HTBP/ping/
pkg://ACE-devel-5.1-1.i386.rpm:994033/ACE_wrappers/protocols/tests/HTBP/  info  downloads[DIR]3  ACE-devel-5.1-1.i386.rpm/ACE_wrappers/protocols/tests/HTBP/ping/
[DIR]  ftp://ftp.free.fr/.mirrors1/ftp.netbsd.org/NetBSD-release-4-0/src/sbin/ping/
[DIR]  ftp://ftp.free.fr/.mirrors1/ftp.netbsd.org/NetBSD-release-3-1/src/sbin/ping/
[DIR]  ftp://ftp.free.fr/.mirrors1/ftp.netbsd.org/NetBSD-release-3-0/src/sbin/ping/
[DIR]  ftp://ftp.free.fr/.mirrors1/ftp.netbsd.org/NetBSD-current/src/sbin/ping/
[DIR]  ftp://ftp.free.fr/.mirrors1/ftp.freebsd.org/development/FreeBSD-CVS/src/sbin/ping/
[DIR]  ftp://ftp.dc.aleron.net/pub/FreeBSD/development/FreeBSD-CVS/src/sbin/ping/
[DIR]  ftp://ftp.cse.buffalo.edu/mirror/BSD/FreeBSD/development/FreeBSD-CVS/src/sbin/ping/
[DIR]  ftp://ftp.atmos.washington.edu/david/ping/
pkg://IPy-0.4.tar.gz:16143/ipv6-dist-domestic/sbin/  downloads[DIR]3  IPy-0.4.tar.gz/ipv6-dist-domestic/sbin/ping/
pkg://MIDI-HOWTO-html.tar.gz:14933/MIDAS-2.2f/Common/  downloads[DIR]3  MIDI-HOWTO-html.tar.gz/MIDAS-2.2f/Common/ping/
[DIR]  ftp://ftp13.freebsd.org/pub/FreeBSD/development/FreeBSD-CVS/src/sbin/ping/
[DIR]  ftp://ftp13.freebsd.org/cvsup/ncvs/src/sbin/ping/
[DIR]  ftp://ftp13.freebsd.org/cvsup/ncvs/projects/validate/testcases/network/tcp_cmds/ping/
[DIR]  ftp://ftp.win.tue.nl/pub/mirror/unix-archive/UnixArchive/PDP-11/Trees/2.11BSD/usr/src/bin/ping/