Tor's packages:
  gettext-0.14.5.zip            - intl.dll
  gettext-dev-0.14.5.zip        - libintl development stuff
  libiconv-1.9.1.bin.woe32.zip

libjpeg:
  http://gnuwin32.sourceforge.net/downlinks/jpeg-bin-zip.php
  http://gnuwin32.sourceforge.net/downlinks/jpeg-lib-zip.php

1) zlib
 zlib is from http://www.zlib.net/zlib123-dll.zip 
 it needs export lib and stuff, USAGE.txt tells what to do:
 i586-mingw32msvc-dlltool -D ../bin/zlib1.dll -d zlib.def -l libz.a
 It produces libz.a, needed to link to zlib1.dll.

2) png
 http://prdownloads.sourceforge.net/libpng/libpng-1.2.18.tar.bz2?download
 ./mingw-configure --without-binconfigs --without-libpng-compat
 Requires zlib.

3) tiff
  ftp://ftp.remotesensing.org/pub/libtiff/tiff-3.8.2.tar.gz
  ./mingw-configure --disable-cxx

4) cairo
  http://cairographics.org/releases/cairo-1.4.10.tar.gz
  ./mingw-configure --without-x

5) glib
  http://ftp.acc.umu.se/pub/GNOME/sources/glib/2.12/glib-2.12.12.tar.bz2
  Needs cache file as described in the docs.
  ./mingw-configure --cache-file=win32.cache
  Needs libiconv and gettext.

6) pango
  http://ftp.acc.umu.se/pub/GNOME/sources/pango/1.16/pango-1.16.4.tar.bz2
  ./mingw-configure --with-included-modules=yes --without-x

7) atk
  http://ftp.acc.umu.se/pub/GNOME/sources/atk/1.18/atk-1.18.0.tar.bz2
  ./mingw-configure

8) libxml2
  http://ftp.acc.umu.se/pub/GNOME/sources/libxml2/2.6/libxml2-2.6.27.tar.bz2
  ./mingw-configure --without-python --without-legacy

9) gtk
  http://ftp.acc.umu.se/pub/GNOME/sources/gtk+/2.10/gtk+-2.10.13.tar.bz2
  ./mingw-configure --enable-maintainer-mode