diff --git a/development/teensy_loader_cli/49-teensy.rules b/development/teensy_loader_cli/49-teensy.rules
new file mode 100644
index 0000000000..b8d3cc7411
--- /dev/null
+++ b/development/teensy_loader_cli/49-teensy.rules
@@ -0,0 +1,30 @@
+# This file must be placed at:
+#
+# /etc/udev/rules.d/49-teensy.rules    (preferred location)
+#   or
+# /lib/udev/rules.d/49-teensy.rules    (req'd on some broken systems)
+#
+#
+SUBSYSTEMS=="usb", ATTRS{idVendor}=="16c0", ATTRS{idProduct}=="04[789]?", MODE:="0666"
+KERNEL=="ttyACM*", ATTRS{idVendor}=="16c0", ATTRS{idProduct}=="04[789]?", SYMLINK+="ttyUSB00%n", MODE:="0666", ENV{ID_MM_DEVICE_IGNORE}="1"
+#
+# If you share your linux system with other users, or just don't like the
+# idea of write permission for everybody, you can replace MODE:="0666" with
+# OWNER:="yourusername" to create the device owned by you, or with
+# GROUP:="somegroupname" and mange access using standard unix groups.
+#
+#
+# If using USB Serial you get a new device each time (Ubuntu 9.10)
+# eg: /dev/ttyACM0, ttyACM1, ttyACM2, ttyACM3, ttyACM4, etc
+#    apt-get remove --purge modemmanager     (reboot may be necessary)
+#
+#
+# Older modem proding (eg, Ubuntu 9.04) caused very slow serial device detection.
+# To fix, add this near top of /lib/udev/rules.d/77-nm-probe-modem-capabilities.rules
+#   SUBSYSTEMS=="usb", ATTRS{idVendor}=="16c0", ATTRS{idProduct}=="04[789]?", GOTO="nm_modem_probe_end" 
+#
+#
+# (old udev rules)
+#SUBSYSTEMS=="usb", ATTRS{idVendor}=="16c0", ATTRS{idProduct}=="047[78]", MODE:="0666"
+#SUBSYSTEMS=="usb", ATTRS{idVendor}=="16c0", ATTRS{idProduct}=="048[02]", MODE:="0666"
+#KERNEL=="ttyACM*", SYMLINK+="ttyUSB00%n", MODE:="0666"
diff --git a/development/teensy_loader_cli/README b/development/teensy_loader_cli/README
new file mode 100644
index 0000000000..2318886f4f
--- /dev/null
+++ b/development/teensy_loader_cli/README
@@ -0,0 +1,14 @@
+The Teensy is a complete USB-based microcontoller development
+system, in a very small footprint, capable of implementing many
+types of projects. All programming is done via the USB port. No
+special programmer is needed, only a standard "Mini-B" USB cable.
+
+The Teensy Loader program communicates with your Teensy board
+when the HalfKay bootloader is running, so you can download new
+programs and run them.
+
+The Teensy Loader is available in a command line version to
+automate programming, typically using a Makefile.
+
+This contains only the cli version of the Teensy Loader. To run
+it type: teensy_loader_cli.
diff --git a/development/teensy_loader_cli/slack-desc b/development/teensy_loader_cli/slack-desc
new file mode 100644
index 0000000000..e168471f56
--- /dev/null
+++ b/development/teensy_loader_cli/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------------------------------------------------------|
+teensy_loader_cli: teensy_loader_cli (Teensy CLI downloader)
+teensy_loader_cli:
+teensy_loader_cli: The Teensy is a complete USB-based microcontoller development system,
+teensy_loader_cli: in a very small footprint, capable of implementing many types of
+teensy_loader_cli: projects. All programming is done via the USB port. No special
+teensy_loader_cli: programmer is needed, only a standard "Mini-B" USB cable.
+teensy_loader_cli:
+teensy_loader_cli: The Teensy Loader program communicates with your Teensy board when the
+teensy_loader_cli: HalfKay bootloader is running, so you can download new programs and
+teensy_loader_cli: run them. The Teensy CLI Loader is a command line version to
+teensy_loader_cli: automate programming, typically using a Makefile.
diff --git a/development/teensy_loader_cli/teensy_loader_cli.SlackBuild b/development/teensy_loader_cli/teensy_loader_cli.SlackBuild
new file mode 100644
index 0000000000..7868ed85f2
--- /dev/null
+++ b/development/teensy_loader_cli/teensy_loader_cli.SlackBuild
@@ -0,0 +1,77 @@
+#!/bin/sh
+
+# Slackware build script for teensy
+
+# Written by Felix Pfeifer (pfeifer [dot] felix [at] googlemail [dot] com)
+
+PRGNAM=teensy_loader_cli
+VERSION=${VERSION:-2.0}
+BUILD=${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
+tar xvf $CWD/$PRGNAM.$VERSION.tar.gz
+cd $PRGNAM
+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 {} \;
+
+CFLAGS="$SLKCFLAGS" \
+CXXFLAGS="$SLKCFLAGS" \
+make
+
+mkdir -p $PKG/usr/bin
+cp $PRGNAM $PKG/usr/bin/
+
+mkdir -p $PKG/etc/udev/rules.d
+cp $CWD/49-teensy.rules $PKG/etc/udev/rules.d
+
+find $PKG | xargs file | grep -e "executable" -e "shared object" | grep ELF \
+  | cut -f 1 -d : | xargs strip --strip-unneeded 2> /dev/null || true
+
+mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION/example-hex-files
+cat $CWD/$PRGNAM.SlackBuild > $PKG/usr/doc/$PRGNAM-$VERSION/$PRGNAM.SlackBuild
+cat gpl3.txt > $PKG/usr/doc/$PRGNAM-$VERSION/COPYING.txt
+cp *.hex $PKG/usr/doc/$PRGNAM-$VERSION/example-hex-files
+
+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/teensy_loader_cli/teensy_loader_cli.info b/development/teensy_loader_cli/teensy_loader_cli.info
new file mode 100644
index 0000000000..b4048904a4
--- /dev/null
+++ b/development/teensy_loader_cli/teensy_loader_cli.info
@@ -0,0 +1,12 @@
+PRGNAM="teensy_loader_cli"
+VERSION="2.0"
+HOMEPAGE="http://www.pjrc.com/teensy/loader_cli.html"
+DOWNLOAD="http://www.pjrc.com/teensy/teensy_loader_cli.2.0.tar.gz \
+          http://www.pjrc.com/teensy/49-teensy.rules"
+MD5SUM="29376dce1b37826c91839a53cff75dc0 \
+        a703a15303e4afb20079e297d14fed8e"
+DOWNLOAD_x86_64=""
+MD5SUM_x86_64=""
+MAINTAINER="Felix Pfeifer"
+EMAIL="pfeifer[dot]felix[at]googlemail[dot]com"
+APPROVED="Niels Horn"