My links
KICAD
Ubuntu ppa Adam Wolf
Schematic converter (gEDA -> KiCAD etc) - needs freetype ( pip install freetype-py and apt-get install freetype*)
viterbi decoder: git clone https://github.com/Opendigitalradio/ka9q-fec.git
Gnuradio installation: http://gnuradio.org/redmine/projects/gnuradio/wiki/PyBOMBS/8
GNSS library http://docs.swift-nav.com/libswiftnav/install.html
DIY