10. Tools & lawn equipment. Dustin Zuckerman in Santa Rosa, California, worked as both a librarian and a handyman. When he discovered that residents of Oakland and Berkeley could check out tools like books from local libraries, he decided to combine his two passions and start his own tool-lending library.

"Today, routers, power tools, shovels, painting kits, saws, sanders, are packed into every conceivable spot of his apartment and garage," writes Rachel Botsman. "In a camper van in his driveway he keeps weed whackers, power hoses and other bulkier equipment."

There might be a tool-lending library in your community, offered by someone like Zuckerman, or through your local library.

And while you're sharing tools, why not also save money by sharing fixing skills? The Brooklyn-based Fixers' Collective brings neighbors together once a week to share tools and help each other fix broken goods that would ordinarily get thrown away. This saves money in more ways than one! Why not start one in your neighborhood?

9. Gardens & yards. You can also share yards and gardens, which saves money on tools and food, among other things. According to attorney Janelle Orsi, "Yard-sharing has many benefits, from access to fresh food to stronger neighborhood connections to environmental sustainability." In The Sharing Solution, Janelle walks readers through all the steps to yard-sharing, from setting expectations to overcoming rules forbidding gardens in front yards. "After all, such rules are archaic and predate our society's growing awareness of problems such as farmland depletion," she writes. "People everywhere have decided to grow food, not lawns!"

While you don't need technology to share a yard, a service like Hyperlocavore can help you manage the process, and perhaps more importantly find potential yardshare partners.

If you live in an urban area and don't have a yard to share, many cities have launched community garden programs, where neighbors share plots in a common space. But you can also start your own public, cooperative garden: When friends went to the city and asked if our neighborhood group could plant a garden in our local playground, the park and recreation department said yes, and even provided tons of support.

8. Your home. Orsi also notes that "Sharing is one solution to an unforgiving housing crisis, and it may even be a trend." Again, in The Sharing Solution she describes many examples of how people saved money and resources by sharing houses, and provides detailed, nuts-and-bolts guidelines for different kinds of homesharing arrangements.

There are also economical models for homeownership including cohousing, community land trusts, and limited equity cooperative housing that leverage shared assets to decrease costs.

There are other ways to share the costs of housing, even if you do not actually own a house. For example, if you live in an apartment building or dense urban area, there is truly no need for each household to have its own private wireless router. Talk to your closest neighbors and see if they'd like to participate in the same wireless network — you'll be able to cut your monthly bill in half, at least, and you might go in together on the cost of the router.

Another example: If you pay a monthly fee for trash pickup, for example, try sharing cans or arranging two-can pickups. Again, you'll probably be able to cut your monthly bill in half.

You can also save money on home maintenance by working with your neighbors on home repair and weatherization. The members of one "work group" in Oakland, Calif., take turns doing repair projects on each other's homes. Another group in Cambridge, Mass., has been organizing monthly weatherization "barnraisings." The barnraisings save energy and money, of course, but they also build community.

Then there's the time honored practice of taking in borders, which has been given a facelift by services like Airbnb — a marketplace for spare rooms, houses, stunning lofts, and even cabooses!

7. Food. There are many ways to save money on food by sharing, and many of them also lead to healthier food on your table. You can organize potlucks and dinner nights among friends, of course, but today there are so many other ways to share healthy food.

You can get involved in helping to grow and harvest the crops. You can join a local community-supported agriculture program or a community-supported kitchen, start a farmers market, and share beef and eggs through regional cooperatives. You might even sign up for a "crop mob" that will give you a chance to get your hands dirty for a day in exchange for a little food.

In addition, people in cities around the country have organized foraging programs that collect fruit from people's yards and redistribute them throughout the neighborhood and to people who can't afford fresh fruit. Neighborhood Fruit has a web site and an iPhone app that can facilitate your foraging.

Believe it or not, there are also restaurants around the world that allow people to barter for food. "I don't know that our five foot bartering wall will be the thing that turns this local economy in the right direction, but I do think we can make a significant impact," says Omer Orian, twenty-something co-owner of Off the Waffle in Eugene, Ore. He argues that his town possesses ample "human and natural resources" to sustain itself. "The lack of cash flow due to the economy should not stop this city from prospering."

6. Stuff. There are now dozens of websites that exist to help you share, exchange, or rent stuff, from furniture to electronics to books — almost anything you need in daily life you can get for low or no cost on the Internet. There's Craigslist and Freecycle, of course, but also start-ups like Rentalic, NeighborGoods, Closest Closet, and EcoModo.

If you look around, you'll likely also find local "really really free markets" where people meet face to face. Share Tompkins, a volunteer-run group based in Ithaca, N.Y., organizes monthly Community Swap Meets, where people give away and barter everything from homemade apple butter to original art to musical instruments. Beyond the tangible activities, writes Shira Golding, "We feel we are contributing to the creation of a social fabric rich in giving and sharing."

That's it for now! Stay tuned for the countdown of the remaining five items on our Top 10 list of things you can share. Until then, remember: We want to hear from you, so please chime in!