This interested me because I realized that I happen to be part of just such a money-free "economy": my local Freecycle group. Within this group, goods are only given and received, never exchanged. Some basic ground rules are that
- you can never ask for any sort of compensation for any item you offer,
- you're supposed to offer at least one item before you start requesting items for yourself, and
- it's considered rude to ask for anything too big or expensive (i.e., "don't ask for an extravagant item like a diamond ring which we'd all like to have").
In fact, Freecycle just might be a near-perfect Marxist economy: "From each according to his ability and to each according to his need." It's not a complete economy, of course: the goods people have to give away aren't enough to meet all the needs of all the group's members. But within its own limitations, it lives up to this ideal quite well.