Permaculture/natural farming

Brin de Paille (association) : asso.permaculture.fr
El portal de permacultura en lengua española : Permacultura ES

Natural Hygiene and health

Désiré Merien : http://www.desiremerien.fr

Non Violent Communication

THE CENTER FOR NONVIOLENT COMMUNICATION
Nonviolent Communication (Wikipedia)
All books by Marshall Rosenberg, creator of NVC

Exchange’s networks

Espana : http://ruralvolunteers.org/WHOSTS/
International : http://www.wwoofinternational.org/
HelpX : http://www.helpx.net

Water management

Joseph Országh (scientifique) www.eautarcie.com,
“Eau vivante” (association) http://eauvivante31.free.fr

Ecolieux

Oasis Bellecombe (Alps, France) http://www.oasisbellecombe.com/

Others links

Town hall (ayuntamiento) of Maella http://www.maella.es/