To clean the flat four things are necessary:
White vinegar - good for windows and descaling kettles
Savon de Marseille - good for surfaces
Bicarbonate of soda - good for deodorising
Savon noir - good for floors
I'm not entirely sure what savon noir is, or why it differs from savon de Marseille, though it's liquid.
You can make washing powder from the above, but we've not tried that yet.
To clean ourselves:
Savon de Marseille or Savon d'Alep.
This is a soap made from olive oil. SdM has some coconut oil added to make more suds. SdA has laurel berry oil.
(For the moment we're still using high-tech toothpaste.)
You make a paste of shea butter, coconut oil, bicarb and cornflour/arrowroot.
Add essential oils like lavender, tea tree, palmarosa, peppermint...
It works as well or better than what we used.