I'm only providing some ebuilds here, at this point, most of them are quite newer that the ones in portage, but be warned, i've tested them not that much and there is no warranty at all from my side.
The ebuilds are stored on the server erazor-zone.de, you can download them via ftp,scp or rsync.
emerge app-portage/gentoolkit-dev
mkdir -p /usr/local/overlays/erazor-zone.de
#erazor-zone.de ebuilds id="erazor-zone.de" description="erazor-zone.de ebuilds" rsync="rsync://erazor-zone.de/portage/" overlay="/usr/local/overlays/erazor-zone.de"
... PORTDIR_OVERLAY="/usr/local/portage /usr/local/overlays/erazor-zone.de" ...
gensync erazor-zone.de
layman -f -o ftp://scponly:scponly@erazor-zone.de/portage/layman.xml
layman -a erazor -o ftp://scponly:scponly@erazor-zone.de/portage/layman.xml
generated at: Sat Nov 16 04:20:03 2013
Simulator for the AVR microcontroller architecture
http://www.nongnu.org/simulavr
a speedy C library for accessing Dynamixel AX servos
https://github.com/erazor83/libdynamixel
extended version of GNU pth (user mode multi threading library)
http://www.auto.tuwien.ac.at/~mkoegler/index.php/pth
A standalone C API for XML-RPC
http://xmlrpc-epi.sourceforge.net/
EZUSB device class, to manage EZUSB via libusb
http://wiki.erazor-zone.de/wiki:projects:python:ezusb
parse intel-hex files in python
http://wiki.erazor-zone.de/wiki:projects:python:ihex
http://www.hurring.com/scott/code/python/serialize/
c2k rpc bindings for python
http://www.ed-solutions.de/dokuwiki/doc:python:c2k
obix serializer/deserializer
http://wiki.erazor-zone.de/wiki:projects:obix
LaTeX styles for bills
http://www.forwiss.uni-passau.de/~berberic/TeX/Rechnung/
tiny svg2png convert tool
http://cairographics.org
http://www.auto.tuwien.ac.at/~mkoegler/index.php/eibdriver
Linux usermode service for Dynamixel AX12/AX18 servos with ZeroMQ interface
https://github.com/erazor83/dynamixel_zmq
Provides an interface to the EIB / KNX bus (latest git)
http://www.auto.tuwien.ac.at/~mkoegler/index.php/eibd
GPIOd - configures GPIO and can call executables depending on inputs
https://github.com/erazor83/gpiod
AS31 Assembler for 8051
http://projects.erazor-zone.de/linux/as31/
Toms AVR macro assembler
http://www.tavrasm.org
a collection of udev-rules from erazor-zone.de
http//erazor-zone.de
A groovy libmodbus
https://launchpad.net/libmodbus/
Web-based IMAP client written in PHP
http://hastymail.sourceforge.net/
Lightweight high-performance web server
http://www.lighttpd.net/