diff --git a/development/4th/01-if_for_64bit.patch b/development/4th/01-if_for_64bit.patch
new file mode 100644
index 0000000000..51aa0d8a11
--- /dev/null
+++ b/development/4th/01-if_for_64bit.patch
@@ -0,0 +1,19 @@
+diff -Nur 4th-3.61.2-unix/sources/4th.h 4th-3.61.2-unix.new/sources/4th.h
+--- 4th-3.61.2-unix/sources/4th.h	2009-11-20 23:52:02.000000000 +0000
++++ 4th-3.61.2-unix.new/sources/4th.h	2011-08-15 19:55:51.674547949 +0000
+@@ -60,11 +60,11 @@
+ #define M4DUPNAM 26
+ #define M4CABORT 27
+ 
+-#define CELL_MIN LONG_MIN
+-#define CELL_MAX LONG_MAX
+-#define strtocell(a,b,c) strtol((a),(b),(c))
++#define CELL_MIN INT_MIN
++#define CELL_MAX INT_MAX
++#define strtocell(a,b,c) (int)strtol((a),(b),(c))
+ 
+-typedef long cell;
++typedef int cell;
+ typedef unsigned char unit;
+ 
+ typedef struct {
diff --git a/development/4th/02-directories.patch b/development/4th/02-directories.patch
new file mode 100644
index 0000000000..a16070aff1
--- /dev/null
+++ b/development/4th/02-directories.patch
@@ -0,0 +1,32 @@
+diff -Nur 4th-3.61.2-unix/sources/Makefile 4th-3.61.2-unix.new/sources/Makefile
+--- 4th-3.61.2-unix/sources/Makefile	2011-08-18 20:34:47.000000000 +0000
++++ 4th-3.61.2-unix.new/sources/Makefile	2011-08-20 01:10:29.653081410 +0000
+@@ -16,13 +16,13 @@
+ 
+ # The following variables may need to be changed
+ 
+-LIBRARIES=/usr/lib
+-INCLUDES=/usr/include
+-BINARIES=/usr/local/bin
+-MANDIR=/usr/share/man
+-DOCDIR=/usr/share/doc
++LIBRARIES=$(DESTDIR)/usr/lib$(LIBSUFFIX)
++INCLUDES=$(DESTDIR)/usr/include
++BINARIES=$(DESTDIR)/usr/bin
++MANDIR=$(DESTDIR)/usr/man
++DOCDIR=$(DESTDIR)/usr/doc
+ SOURCES=../4th
+-CFLAGS= -DUNIX -fsigned-char -Wall -O3 -s
++CFLAGS=$(CXXFLAGS) -DUNIX -fsigned-char -Wall -s
+ 
+ # Cross compilation variables
+ LD=$(CROSS)ld
+@@ -125,7 +125,7 @@
+ 
+ install: mostlyinstall
+ 	install -Dm644 ../documentation/4th.1 $(MANDIR)/man1/4th.1
+-	install -Dm644 ../documentation/4tHmanual.txt $(DOCDIR)/4th/
++	install -Dm644 ../documentation/4tHmanual.txt $(DOCDIR)/4th-3.61.2/
+ 
+ uninstall:
+ 	-rm -f $(LIBRARIES)/lib4th.{a,so*}
diff --git a/development/4th/4th.SlackBuild b/development/4th/4th.SlackBuild
new file mode 100644
index 0000000000..0fe35855a4
--- /dev/null
+++ b/development/4th/4th.SlackBuild
@@ -0,0 +1,85 @@
+#!/bin/sh
+
+# Slackware build script for 4th
+
+# Written by Zbigniew Baniewski, zb@ispid.com.pl
+
+PRGNAM=4th
+VERSION=3.61.2
+BUILD=${BUILD:-1}
+TAG=${TAG:-_SBo}
+
+if [ -z "$ARCH" ]; then
+  case "$( uname -m )" in
+    i?86) ARCH=i486 ;;
+    arm*) ARCH=arm ;;
+       *) ARCH=$( 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 $PRGNAM-$VERSION-unix
+tar xvf $CWD/$PRGNAM-$VERSION-unix.tar.gz
+cat $CWD/02-directories.patch | patch -p0 || exit
+cd $PRGNAM-$VERSION-unix/sources
+chown -R root:root .
+find . \
+ \( -perm 777 -o -perm 775 -o -perm 711 -o -perm 555 -o -perm 511 \) \
+ -exec chmod 755 {} \; -o \
+ \( -perm 666 -o -perm 664 -o -perm 600 -o -perm 444 -o -perm 440 -o -perm 400 \) \
+ -exec chmod 644 {} \;
+
+if [ "$ARCH" = "x86_64" ]; then
+  cat $CWD/01-if_for_64bit.patch | patch -p2 || exit
+  cp include/* .
+fi
+
+mkdir -p $PKG/usr/lib$LIBDIRSUFFIX
+mkdir -p $PKG/usr/man/man1
+mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION/examples
+mkdir -p $PKG/usr/bin
+CXXFLAGS="$SLKCFLAGS" make
+make install DESTDIR="$PKG" LIBSUFFIX="$LIBDIRSUFFIX"
+
+cp $TMP/$PRGNAM-$VERSION-unix/documentation/4th.1 $PKG/usr/man/man1
+cp $TMP/$PRGNAM-$VERSION-unix/documentation/*.txt $PKG/usr/doc/$PRGNAM-$VERSION
+cp $TMP/$PRGNAM-$VERSION-unix/4th/.directory $PKG/usr/doc/$PRGNAM-$VERSION
+cp $TMP/$PRGNAM-$VERSION-unix/COPYING $PKG/usr/doc/$PRGNAM-$VERSION
+cp $TMP/$PRGNAM-$VERSION-unix/README $PKG/usr/doc/$PRGNAM-$VERSION
+cp -r $TMP/$PRGNAM-$VERSION-unix/4th/* $PKG/usr/doc/$PRGNAM-$VERSION/examples
+find $PKG | xargs file | grep -e "executable" -e "shared object" | grep ELF \
+  | cut -f 1 -d : | xargs strip --strip-unneeded 2> /dev/null || true
+
+find $PKG/usr/man -type f -exec gzip -9 {} \;
+for i in $( find $PKG/usr/man -type l ) ; do ln -s $( readlink $i ).gz $i.gz ; rm $i ; done
+
+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/development/4th/4th.info b/development/4th/4th.info
new file mode 100644
index 0000000000..59403c57cd
--- /dev/null
+++ b/development/4th/4th.info
@@ -0,0 +1,10 @@
+PRGNAM="4th"
+VERSION="3.61.2"
+HOMEPAGE="http://thebeez.home.xs4all.nl/4tH/"
+DOWNLOAD="http://4th.googlecode.com/files/4th-3.61.2-unix.tar.gz"
+MD5SUM="b2730f7b68c91510e1b3762ab08d641b"
+DOWNLOAD_x86_64=""
+MD5SUM_x86_64=""
+MAINTAINER="Zbigniew Baniewski"
+EMAIL="zb@ispid.com.pl"
+APPROVED=""
diff --git a/development/4th/README b/development/4th/README
new file mode 100644
index 0000000000..dfdcb3236d
--- /dev/null
+++ b/development/4th/README
@@ -0,0 +1,7 @@
+4tH is basic framework for creating application specific scripting
+languages. It is a library of functions centered around a virtual
+machine, which guarantees high performance, ease of use and low overhead.
+
+But in the meanwhile 4tH has acquired a reputation as an educational
+tool. Its simplicity makes it perfectly suited to learn Forth, from which
+it has been derived.
diff --git a/development/4th/slack-desc b/development/4th/slack-desc
new file mode 100644
index 0000000000..a30d98944d
--- /dev/null
+++ b/development/4th/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------------------------------------------------------|
+4th: 4th (The friendly Forth compiler/interpreter)
+4th:
+4th: It detects virtually every error and reports what and where
+4th: they occur, but is still fast and compact.
+4th:
+4th: http://www.gnu.org/software/4th/
+4th:
+4th: Licence: GNU LGPL V3
+4th:
+4th:
+4th: