diff --git a/graphics/zgrviewer/README b/graphics/zgrviewer/README
new file mode 100644
index 0000000000..96ae80d62e
--- /dev/null
+++ b/graphics/zgrviewer/README
@@ -0,0 +1,7 @@
+ZGRViewer is a graph visualizer implemented in Java and based upon the
+Zoomable Visual Transformation Machine. It is specifically aimed at
+displaying graphs expressed using the DOT language from AT&T GraphViz
+and processed by programs dot, neato or others such as twopi.
+
+The required java is listed as zulu-openjdk11, but the build might
+work with some other java as well.
diff --git a/graphics/zgrviewer/slack-desc b/graphics/zgrviewer/slack-desc
new file mode 100644
index 0000000000..b83985c07b
--- /dev/null
+++ b/graphics/zgrviewer/slack-desc
@@ -0,0 +1,19 @@
+# HOW TO EDIT THIS FILE:
+# The "handy ruler" below makes it easier to edit a package description.
+# Line up the first '|' above the ':' following the base package name, and
+# the '|' on the right side marks the last column you can put a character in.
+# You must make exactly 11 lines for the formatting to be correct.  It's also
+# customary to leave one space after the ':' except on otherwise blank lines.
+
+         |-----handy-ruler------------------------------------------------------|
+zgrviewer: zgrviewer (GUI graph viewer)
+zgrviewer:
+zgrviewer: ZGRViewer is a graph visualizer implemented in Java and based upon
+zgrviewer: the Zoomable Visual Transformation Machine. It is specifically aimed
+zgrviewer: at displaying graphs expressed using the DOT language from AT&T
+zgrviewer: GraphViz and processed by programs dot, neato or others such as
+zgrviewer: twopi.
+zgrviewer:
+zgrviewer:
+zgrviewer:
+zgrviewer:
diff --git a/graphics/zgrviewer/zgrviewer b/graphics/zgrviewer/zgrviewer
new file mode 100644
index 0000000000..50ef7a24f7
--- /dev/null
+++ b/graphics/zgrviewer/zgrviewer
@@ -0,0 +1,4 @@
+#!/bin/sh
+
+cd /opt/zgrviewer-MY_VERSION/ || exit 1
+exec ./run.sh $@
diff --git a/graphics/zgrviewer/zgrviewer.SlackBuild b/graphics/zgrviewer/zgrviewer.SlackBuild
new file mode 100644
index 0000000000..804dc2c091
--- /dev/null
+++ b/graphics/zgrviewer/zgrviewer.SlackBuild
@@ -0,0 +1,105 @@
+#!/bin/bash
+
+# Slackware build script for zgrviewer
+
+# Copyright 2023, Lockywolf
+# All rights reserved.
+#
+# Redistribution and use of this script, with or without modification, is
+# permitted provided that the following conditions are met:
+#
+# 1. Redistributions of this script must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+#
+#  THIS SOFTWARE IS PROVIDED BY THE AUTHOR "AS IS" AND ANY EXPRESS OR IMPLIED
+#  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+#  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO
+#  EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+#  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+#  PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+#  OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+#  WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+#  OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+#  ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
+cd $(dirname $0) ; CWD=$(pwd)
+
+PRGNAM=zgrviewer
+VERSION=${VERSION:-0.10.0}
+BUILD=${BUILD:-1}
+TAG=${TAG:-_SBo}
+PKGTYPE=${PKGTYPE:-tgz}
+
+if [ -z "$ARCH" ]; then
+  case "$( uname -m )" in
+    i?86) ARCH=i586 ;;
+    arm*) ARCH=arm ;;
+       *) ARCH=$( uname -m ) ;;
+  esac
+fi
+
+if [ ! -z "${PRINT_PACKAGE_NAME}" ]; then
+  echo "$PRGNAM-$VERSION-$ARCH-$BUILD$TAG.$PKGTYPE"
+  exit 0
+fi
+
+TMP=${TMP:-/tmp/SBo}
+PKG=$TMP/package-$PRGNAM
+OUTPUT=${OUTPUT:-/tmp}
+
+if [ "$ARCH" = "i586" ]; then
+  SLKCFLAGS="-O2 -march=i586 -mtune=i686"
+  LIBDIRSUFFIX=""
+elif [ "$ARCH" = "i686" ]; then
+  SLKCFLAGS="-O2 -march=i686 -mtune=i686"
+  LIBDIRSUFFIX=""
+elif [ "$ARCH" = "x86_64" ]; then
+  SLKCFLAGS="-O2 -fPIC"
+  LIBDIRSUFFIX="64"
+elif [ "$ARCH" = "aarch64" ]; then
+  SLKCFLAGS="-O2 -fPIC"
+  LIBDIRSUFFIX="64"
+else
+  SLKCFLAGS="-O2"
+  LIBDIRSUFFIX=""
+fi
+
+set -e
+
+rm -rf $PKG
+mkdir -p $TMP $PKG $OUTPUT
+cd $TMP
+rm -rf $PRGNAM-$VERSION
+unzip $CWD/$PRGNAM-${VERSION}.zip
+cd $PRGNAM-$VERSION
+chown -R root:root .
+find -L . \
+ \( -perm 777 -o -perm 775 -o -perm 750 -o -perm 711 -o -perm 555 \
+  -o -perm 511 \) -exec chmod 755 {} + -o \
+ \( -perm 666 -o -perm 664 -o -perm 640 -o -perm 600 -o -perm 444 \
+  -o -perm 440 -o -perm 400 \) -exec chmod 644 {} +
+
+install -Dm755 $CWD/$PRGNAM $PKG/usr/bin/$PRGNAM
+install -d -m 755 $PKG/opt/$PRGNAM-$VERSION
+cp -r . $PKG/opt/$PRGNAM-$VERSION/
+sed -i "s/MY_VERSION/$VERSION/g" $PKG/usr/bin/zgrviewer
+rm $PKG/opt/$PRGNAM-$VERSION/src/main/java/net/claribole/.DS_Store
+# rmdir $PKG/opt/$PRGNAM-$VERSION/tmp
+# rmdir $PKG/opt/$PRGNAM-$VERSION/plugins
+# rmdir $PKG/opt/$PRGNAM-$VERSION/target/generated-sources/annotations
+# rmdir $PKG/opt/$PRGNAM-$VERSION/target/generated-sources/test-annotations
+
+
+mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION
+cp -a \
+xerces.license.txt antlr.license.txt zvtm.license.txt \
+   $PKG/usr/doc/$PRGNAM-$VERSION
+chmod 444 $PKG/usr/doc/$PRGNAM-$VERSION/*
+cat $CWD/$PRGNAM.SlackBuild > $PKG/usr/doc/$PRGNAM-$VERSION/$PRGNAM.SlackBuild
+
+mkdir -p $PKG/install
+cat $CWD/slack-desc > $PKG/install/slack-desc
+
+cd $PKG
+/sbin/makepkg -l y -c n $OUTPUT/$PRGNAM-$VERSION-$ARCH-$BUILD$TAG.$PKGTYPE
diff --git a/graphics/zgrviewer/zgrviewer.info b/graphics/zgrviewer/zgrviewer.info
new file mode 100644
index 0000000000..81ea7ebd30
--- /dev/null
+++ b/graphics/zgrviewer/zgrviewer.info
@@ -0,0 +1,10 @@
+PRGNAM="zgrviewer"
+VERSION="0.10.0"
+HOMEPAGE="https://zvtm.sourceforge.net/zgrviewer.html"
+DOWNLOAD="https://versaweb.dl.sourceforge.net/project/zvtm/zgrviewer/0.10.0/zgrviewer-0.10.0.zip"
+MD5SUM="d6d3a2276b44b0d8918a13ba267be1bb"
+DOWNLOAD_x86_64=""
+MD5SUM_x86_64=""
+REQUIRES="zulu-openjdk11"
+MAINTAINER="Lockywolf"
+EMAIL="for_sbo.zgrviewer_2023-07-28@lockywolf.net"