diff --git a/pngzop_brute.sh b/pngzop_brute.sh
deleted file mode 100755
index 58be7ebf2..000000000
--- a/pngzop_brute.sh
+++ /dev/null
@@ -1,30 +0,0 @@
-#!/bin/sh
-
-# pngzop_brute.sh
-
-# For use in the pngzop project
-# Copyright 2013 by Glenn Randers-Pehrson
-# Released under the pngcrush license (equivalent to the libpng license)
-
-# Extracts the concatenated data from the IDAT chunks in a set of PNG files,
-# recompresses them with zopfli, and embeds them in a new set of PNG files
-# with suffix ".png" replaced with "_pngzop_brute.png"
-
-# Usage:
-# pngzop_brute *.png
-
-# Standard Input: *.png
-# Output: *_pngzop_brute.png
-
-# To do: Adjust zlib CMF to reflect actual windowBits required.
-
-for x in $*
-do
-  root=`echo $1 | sed -e s/.png$//`
-  pngzop_get_ihdr.exe < $1 > ${root}_pngzop_brute.png
-  pngzop_brute_zopfli.sh $1
-  pngzop_zlib_to_idat.exe < ${root}.zlib >> ${root}_pngzop_brute.png
-  rm ${root}.zlib
-  pngzop_get_iend.exe < $1 >> ${root}_pngzop_brute.png
-  shift
-done
diff --git a/pngzop_brute_zopfli.sh b/pngzop_brute_zopfli.sh
deleted file mode 100755
index 2a670a77c..000000000
--- a/pngzop_brute_zopfli.sh
+++ /dev/null
@@ -1,47 +0,0 @@
-#!/bin/sh
-
-# png_brute_zopfli.sh
-
-# For use in the pngzop project
-# Copyright 2013 by Glenn Randers-Pehrson
-# Released under the pngcrush license (equivalent to the libpng license)
-
-# Usage:
-# png_brute_zopfli.sh file.png [...]
-
-# Input: *.png, a set of PNG files
-# Output: *.zlib, zopfli-compressed IDAT data
-
-for x in $*
-do
-root=`echo $1 | sed -e "s/.png$//"`
-
-# Generate trial PNGs with filter none, 4 PNG filters, and adaptive filter
-for f in 0 1 2 3 4 5
-do
-  pngcrush -q -m 1 -f $f -force $1 ${root}_f$f.png &
-done
-wait
-
-# Extract and decompress the zlib datastream from the concatenated IDAT chunks.
-for f in 0 1 2 3 4 5
-do
-  pngzop_get_idat.exe < ${root}_f$f.png | zpipe -d > ${root}_f$f.idat &
-done
-wait
-rm -f ${root}_f?.png
-
-# Recompress the IDAT data using zopfli
-for f in 0 1 2 3 4 5
-do
-  zopfli --i25 --zlib ${root}_f$f.idat &
-done
-wait
-rm -f ${root}_f?.idat
-
-# Copy the smallest result to file.zlib
-cat `pngzop_smallest.sh ${root}_f?.idat.zlib | tail -1` > ${root}.zlib
-rm -f ${root}_f?.idat.zlib
-
-shift
-done
diff --git a/pngzop_get_idat.sh b/pngzop_get_idat.sh
deleted file mode 100644
index 6e7242ee9..000000000
--- a/pngzop_get_idat.sh
+++ /dev/null
@@ -1,22 +0,0 @@
-#!/bin/sh
-
-# png_get_idat.sh
-
-# For use in the pngzop project
-# Copyright 2013 by Glenn Randers-Pehrson
-# Released under the pngcrush license (equivalent to the libpng license)
-
-# Extracts and decompresses the data from the IDAT chunks in a set of
-# PNG files.
-
-# Usage:
-# png_get_idat.sh file.png
-
-# Output: file.idat
-
-for x in $*
-do
-     root=`echo $1 | sed -e "s/.png$//"`
-     pngzop_get_idat.exe < $1 | zpipe -d  > $root.idat
-     shift
-done
diff --git a/pngzop_get_zdat.sh b/pngzop_get_zdat.sh
deleted file mode 100755
index be6b8dd76..000000000
--- a/pngzop_get_zdat.sh
+++ /dev/null
@@ -1,22 +0,0 @@
-#!/bin/sh
-
-# pngzop_get_zdat.sh
-
-# For use in the pngzop project
-# Copyright 2013 by Glenn Randers-Pehrson
-# Released under the pngcrush license (equivalent to the libpng license)
-
-# Extracts the concatenated data from the IDAT chunks in a set of PNG files,
-# leaving it compressed as found.
-
-# Usage:
-# pngzop_get_zdat.sh file.png
-
-# Output: file.zdat
-
-for x in $*
-do
-  root=`echo $1 | sed -e s/.png$//`
-  pngzop_get_idat.exe < $1 > $root.zdat
-  shift
-done
diff --git a/pngzop_pngcrush.sh b/pngzop_pngcrush.sh
deleted file mode 100755
index d86ecd54c..000000000
--- a/pngzop_pngcrush.sh
+++ /dev/null
@@ -1,28 +0,0 @@
-#!/bin/sh
-
-# pngzop_pngcrush.sh
-
-# For use in the pngzop project
-# Copyright 2013 by Glenn Randers-Pehrson
-# Released under the pngcrush license (equivalent to the libpng license)
-
-# Extracts the concatenated data from the IDAT chunks in a set of PNG files,
-# recompresses them with zopfli, and embeds them in a new set of PNG files
-# with suffix ".png" replaced with "_pngzop.png"
-
-# Usage:
-# pngzop_pngcrush.sh *.png
-
-# Standard Input: *.png
-# Output: *_pngzop.png
-
-# To do: Adjust zlib CMF to reflect actual windowBits required.
-
-for x in $*
-do
-  root=`echo $1 | sed -e s/.png$//`
-  pngzop_get_ihdr.exe < $1 > ${root}_pngzop.png
-  pngzop_pngcrush_zopfli.sh $1 | pngzop_zlib_to_idat.exe >> ${root}_pngzop.png
-  pngzop_get_iend.exe < $1 >> ${root}_pngzop.png
-  shift
-done
diff --git a/pngzop_pngcrush_zopfli.sh b/pngzop_pngcrush_zopfli.sh
deleted file mode 100755
index 30673eb7a..000000000
--- a/pngzop_pngcrush_zopfli.sh
+++ /dev/null
@@ -1,29 +0,0 @@
-#!/bin/sh
-
-# For use in the pngzop project
-# Copyright 2013 by Glenn Randers-Pehrson
-# Released under the pngcrush license (equivalent to the libpng license)
-
-# Usage:
-# pngzop_pngcrush_zopfli.sh file.png > file.zlib
-
-# file.png is a PNG file.
-# Standard output is the uncompressed IDAT chunk data, recompressed as a zlib
-# datastream.
-
-root=`echo $1 | sed -e "s/.png$//"`
-rm -f ${root}_L9.png
-
-# Do pngcrush level 9 with none, 4 filters, and adaptive filtering, and
-# select the smallest.
-pngcrush -q -m 113 -m 114 -m 115 -m 116 -m 117 -m 118 \
-         -force $1 ${root}_L9.png
-
-# Extract and decompress the zlib datastream from the concatenated IDAT chunks.
-pngzop_get_idat.exe < ${root}_L9.png | zpipe -d > ${root}_L9.idat
-rm ${root}_L9.png
-
-# Recompress with zopfli and write it on standard output.
-zopfli --i25 --zlib -c ${root}_L9.idat
-
-rm ${root}_L9.idat
diff --git a/pngzop_smallest.sh b/pngzop_smallest.sh
deleted file mode 100755
index 158b2e3ed..000000000
--- a/pngzop_smallest.sh
+++ /dev/null
@@ -1,42 +0,0 @@
-#!/bin/sh
-
-# For use in the pngzop project
-# Copyright 2013 by Glenn Randers-Pehrson
-# Released under the pngcrush license (equivalent to the libpng license)
-
-# Selects the smaller of file.zdat (extracted from a PNG) or
-# file.idat.zlib (same but recompressed with zopfli)
-
-# picksmallest file1 file...
-
-# for use on platforms that do not have "ls -S"
-
-smallest=$1
-smallsize=`ls -l $1 | sed -e "
-s/[^ 	]*[	 ]*\
-[^ 	]*[	 ]*\
-[^ 	]*[	 ]*\
-[^ 	]*[	 ]*\
-//" -e "s/[ 	].*//"`
-
-shift
-
-for x in $*
-do
-file=$1
-shift
-
-size=`ls -l $file | sed -e "
-s/[^ 	]*[	 ]*\
-[^ 	]*[	 ]*\
-[^ 	]*[	 ]*\
-[^ 	]*[	 ]*\
-//" -e "s/[ 	].*//"`
-
-if [ $smallsize -gt $size 	] ; then
-smallest=$file
-smallsize=$size
-fi
-done
-
-echo $smallest