Twin directories of converters:

[DIR]  ftp://ftp.eutelia.it/pub/Sunsite_Mirror/apps/www/converters/
[DIR]  ftp://ftp.ci.pwr.wroc.pl/pub/kkio/prototype/class/converters/
[DIR]  ftp://ftp.cirr.com/pub/NetBSD/packages/i386/converters/
[DIR]  ftp://ftp.internat.freebsd.org/pub/FreeBSD/ports/amd64/packages-8-current/converters/
[DIR]  ftp://ftp.internat.freebsd.org/pub/FreeBSD/ports/converters/
[DIR]  ftp://ftp.internat.freebsd.org/pub/FreeBSD/ports/i386/packages-8-current/converters/
[DIR]  ftp://ftp.internat.freebsd.org/pub/FreeBSD/ports/i386/packages-7.1-release/converters/
[DIR]  ftp://ftp.internat.freebsd.org/pub/FreeBSD/ports/i386/packages-7.0-release/converters/
[DIR]  ftp://ftp.internat.freebsd.org/pub/FreeBSD/ports/i386/packages-7-stable/converters/
[DIR]  ftp://ftp.internat.freebsd.org/pub/FreeBSD/ports/i386/packages-6.4-release/converters/
[DIR]  ftp://ftp.internat.freebsd.org/pub/FreeBSD/ports/i386/packages-6.3-release/converters/
[DIR]  ftp://ftp.internat.freebsd.org/pub/FreeBSD/ports/i386/packages-6-stable/converters/
[DIR]  ftp://ftp.farlep.net/pub/Linux/sound/converters/
[DIR]  ftp://ftp.farlep.net/pub/linux/sound/converters/
[DIR]  ftp://ftp.netbsd.org/pub/pkgsrc/reports/SunOS/i386/5.10_2008Q4_sunpro/converters/
[DIR]  ftp://ftp.netbsd.org/pub/pkgsrc/reports/SunOS/i386/5.10_head-20090317_sunpro/converters/
[DIR]  ftp://ftp.gno.org/pub/apple2/gs.specific/utils/converters/
[DIR]  ftp://ftp.gno.org/pub/apple2/appledos33/utils/converters/
[DIR]  ftp://ftp.gno.org/pub/apple2/prodos/utils/converters/
[DIR]  ftp://ftp.beos.hu/pub/beos/obsolete/gfx/converters/
[DIR]  ftp://ftp.kreonet.re.kr/tools/graphics/povray/utilities/converters/
[DIR]  ftp://ftp.kreonet.re.kr/tools/X11/kde/Attic/2.2.2/FreeBSD/converters/
[DIR]  ftp://ftp.kreonet.re.kr/gnu/ibiblio/www/savannah-checkouts/gnu/texmacs-doc/about/contribute/converters/
[DIR]  ftp://ftp.telstra.net/pub/FreeBSD/ports/amd64/packages-8-current/converters/
[DIR]  ftp://ftp.uni-stuttgart.de/pub/systems/acorn/acornet/long/graphics/converters/
[DIR]  ftp://ftp.uni-stuttgart.de/pub/systems/acorn/acornet/long/sound/converters/
[DIR]  ftp://ftp.uni-stuttgart.de/pub/systems/acorn/acornet/long/text/converters/
[DIR]  ftp://ftp.uni-hannover.de/pub/mirror/bsd/NetBSD/packages/current-packages/QNX/i386/6.4.0_head_20081005/converters/
[DIR]  ftp://ftp.uni-hannover.de/pub/mirror/bsd/FreeBSD/ports/i386/i386/packages-5-stable/converters/
[DIR]  ftp://ftp.uni-hannover.de/pub/mirror/bsd/NetBSD/packages/current-src/pkgsrc/converters/
[DIR]  ftp://ftp.uni-hannover.de/pub/mirror/bsd/FreeBSD/ports/ia64/packages-7-current/converters/
[DIR]  ftp://ftp.uni-hannover.de/pub/mirror/bsd/FreeBSD/ports/ia64/packages-6-stable/converters/
[DIR]  ftp://ftp.uni-hannover.de/pub/mirror/bsd/FreeBSD/ports/i386/packages-8-current/converters/
[DIR]  ftp://ftp.uni-hannover.de/pub/mirror/bsd/FreeBSD/ports/i386/packages-7.1-release/converters/
[DIR]  ftp://ftp.uni-hannover.de/pub/mirror/bsd/FreeBSD/ports/i386/packages-7.0-release/converters/
[DIR]  ftp://ftp.uni-hannover.de/pub/mirror/bsd/FreeBSD/ports/i386/packages-7-stable/converters/
[DIR]  ftp://ftp.uni-hannover.de/pub/mirror/bsd/FreeBSD/ports/i386/i386/packages-7-stable/converters/
[DIR]  ftp://ftp.uni-hannover.de/pub/mirror/bsd/FreeBSD/ports/i386/packages-6.4-release/converters/
[DIR]  ftp://ftp.uni-hannover.de/pub/mirror/bsd/FreeBSD/ports/i386/packages-6.3-release/converters/
[DIR]  ftp://ftp.uni-hannover.de/pub/mirror/bsd/FreeBSD/ports/i386/packages-6-stable/converters/
[DIR]  ftp://ftp.uni-hannover.de/pub/mirror/bsd/FreeBSD/ports/i386/packages-5-stable/converters/
[DIR]  ftp://ftp.uni-hannover.de/pub/mirror/bsd/FreeBSD/ports/amd64/packages-8-current/converters/
[DIR]  ftp://ftp.uni-hannover.de/pub/mirror/bsd/FreeBSD/ports/amd64/packages-7.1-release/converters/
[DIR]  ftp://ftp.uni-hannover.de/pub/mirror/bsd/FreeBSD/ports/amd64/packages-7.0-release/converters/
[DIR]  ftp://ftp.uni-hannover.de/pub/mirror/bsd/FreeBSD/ports/amd64/packages-7-stable/converters/
[DIR]  ftp://ftp.uni-hannover.de/pub/mirror/bsd/FreeBSD/ports/amd64/packages-6.4-release/converters/
[DIR]  ftp://ftp.uni-hannover.de/pub/mirror/bsd/FreeBSD/ports/amd64/packages-6.3-release/converters/
[DIR]  ftp://ftp.uni-hannover.de/pub/mirror/bsd/FreeBSD/ports/amd64/packages-6-stable/converters/
[DIR]  ftp://ftp.uni-hannover.de/pub/mirror/bsd/FreeBSD/ports/amd64/packages-5-stable/converters/
[DIR]  ftp://ftp.uni-hannover.de/pub/mirror/bsd/FreeBSD/development/FreeBSD-CVS/ports/converters/