Other ideas and links
From low tech network
local announcements websites
For buying/selling secondhand, etc. Better than ebay because you meet the person face-to-face and put money in the hand. No third parties pinching fees, no stupid rules, no sending stuff from the other side of the planet. This requires some trust, which builds community.
- craigslist.org international
- freecycle international, free stuff only.
- le bon coin france
- gumtree UK
- quoka.de deutschland
- loquo.com barcelona
- tutti.ch CH
other
open source ecology RAM pump using water flow to pump a small amount of water
