diff --git a/libraries/gtkmm3/README b/libraries/gtkmm3/README
new file mode 100644
index 0000000000..d10e76ae9c
--- /dev/null
+++ b/libraries/gtkmm3/README
@@ -0,0 +1,5 @@
+gtkmm is the official C++ interface for the popular GUI library
+GTK+. Highlights include typesafe callbacks, and a comprehensive set
+of widgets that are easily extensible via inheritance. You can create
+user interfaces and there's extensive documentation, including
+including API reference and a tutorial.
diff --git a/libraries/gtkmm3/gtkmm3.SlackBuild b/libraries/gtkmm3/gtkmm3.SlackBuild
new file mode 100644
index 0000000000..cb2b91ed95
--- /dev/null
+++ b/libraries/gtkmm3/gtkmm3.SlackBuild
@@ -0,0 +1,97 @@
+#!/bin/sh
+
+# Slackware build script for gtkmm3
+
+# Copyright (C) 2006 paul wisehart wise@lupulin.net
+# 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.
+
+# Modified by Robby Workman <rworkman@slackbuilds.org>
+# Forked for gtkmm3 by Matteo Bernardini <ponce@slackbuilds.org>
+
+PRGNAM=gtkmm3
+SRCNAM=gtkmm
+VERSION=${VERSION:-3.4.1}
+BUILD=${BUILD:-1}
+TAG=${TAG:-_SBo}
+
+# Automatically determine the architecture we're building on:
+if [ -z "$ARCH" ]; then
+  case "$( uname -m )" in
+    i?86) ARCH=i486 ;;
+    arm*) ARCH=arm ;;
+    # Unless $ARCH is already set, use uname -m for all other archs:
+       *) ARCH=$( uname -m ) ;;
+  esac
+fi
+
+CWD=$(pwd)		
+TMP=${TMP:-/tmp/SBo}
+PKG=$TMP/package-$PRGNAM
+OUTPUT=${OUTPUT:-/tmp}
+
+if [ "$ARCH" = "i486" ]; then
+  SLKCFLAGS="-O2 -march=i486 -mtune=i686"
+  LIBDIRSUFFIX=""
+elif [ "$ARCH" = "i686" ]; then
+  SLKCFLAGS="-O2 -march=i686 -mtune=i686"
+  LIBDIRSUFFIX=""
+elif [ "$ARCH" = "x86_64" ]; 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 $SRCNAM-$VERSION
+tar xvf $CWD/$SRCNAM-$VERSION.tar.?z*
+cd $SRCNAM-$VERSION
+chown -R root:root .
+chmod -R a-s,u+rw,go-w+r .
+
+CFLAGS="$SLKCFLAGS" \
+CXXFLAGS="$SLKCFLAGS" \
+  ./configure \
+  --prefix=/usr \
+  --libdir=/usr/lib${LIBDIRSUFFIX} \
+  --sysconfdir=/etc \
+  --localstatedir=/var \
+  --docdir=/usr/doc/$PRGNAM-$VERSION \
+  --disable-static \
+  --build=$ARCH-slackware-linux
+
+make libdocdir=/usr/doc/$PRGNAM-$VERSION
+make install-strip DESTDIR=$PKG libdocdir=/usr/doc/$PRGNAM-$VERSION
+
+mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION
+cp -a AUTHORS COPYING ChangeLog INSTALL NEWS PORTING README* \
+  $PKG/usr/doc/$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:-tgz}
diff --git a/libraries/gtkmm3/gtkmm3.info b/libraries/gtkmm3/gtkmm3.info
new file mode 100644
index 0000000000..ddc6dc3d4d
--- /dev/null
+++ b/libraries/gtkmm3/gtkmm3.info
@@ -0,0 +1,10 @@
+PRGNAM="gtkmm3"
+VERSION="3.4.1"
+HOMEPAGE="http://www.gtkmm.org/"
+DOWNLOAD="http://ftp.gnome.org/pub/gnome/sources/gtkmm/3.4/gtkmm-3.4.1.tar.xz"
+MD5SUM="b7d9b14fe6083d63513b930a97b51630"
+DOWNLOAD_x86_64=""
+MD5SUM_x86_64=""
+REQUIRES="atkmm mm-common pangomm"
+MAINTAINER="Matteo Bernardini"
+EMAIL="ponce@slackbuilds.org"
diff --git a/libraries/gtkmm3/slack-desc b/libraries/gtkmm3/slack-desc
new file mode 100644
index 0000000000..fd004c2b20
--- /dev/null
+++ b/libraries/gtkmm3/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 ':'.
+
+      |-----handy-ruler------------------------------------------------------|
+gtkmm3: gtkmm3 (C++ interface for GTK+3)
+gtkmm3:
+gtkmm3: gtkmm is the official C++ interface for the popular GUI library
+gtkmm3: GTK+. Highlights include typesafe callbacks, and a comprehensive set
+gtkmm3: of widgets that are easily extensible via inheritance. You can create
+gtkmm3: user interfaces and there's extensive documentation, including
+gtkmm3: including API reference and a tutorial.
+gtkmm3: 
+gtkmm3: Homepage: http://www.gtkmm.org/
+gtkmm3: 
+gtkmm3: