Have you looked at cartridge? It is based on Mezzanine which is really just Django. Decent feature set, though not extensive. Completely open source. mezzani

Have you looked at cartridge? It is based on Mezzanine which is really just Django. Decent feature set, though not extensive. Completely open source. mezzanine.jupo.org https://github.com/stephenmcd/cartridge https://github.com/stephenmcd/cartridge