What software would you recommend to maintain a 'community garden', collectively with others? Where the tech isn't in-your-face and leaves room to be creative t

What software would you recommend to maintain a 'community garden', collectively with others? Where the tech isn't in-your-face and leaves room to be creative together, stimulating people to contribute. Of course, this could be any forum or collaboration software combined with good old community-building, but maybe there's software that particularly fits this 'gardening' idea.