“It is a scientific fact that giving makes you feel good—it literally raises the endorphins, just like games do,” says Lesley Mansford, a video-game marketing vet who is using her tech savvy to her philanthropic advantage. “If you can mix gaming mechanics with giving, that’s a very powerful elixir,” she says.

As CEO of six-year-old D.C. startup Razoo, which opened its second headquarters in San Francisco this summer, Mansford is looking to help charitable ventures cash in with “crowdfunding,” that buzzword made popular by Kickstarter.

If you like buying fresh food at the farmers market and supporting local farmers, you’ve got a brand new option as of today in San Francisco, and that is to set up your own localized weekly delivery site and manage it online.

Farmigo is launching this initiative here and in New York, with other cities to follow soon.

A little more than six months ago, Yan-David Erlich was sitting in a restaurant when he noticed a waiter bring a black-and-white coloring pad plus some crayons to the children sitting at the next table.

“I started wondering what the online equivalent of that was,” he recalls. “And I realized that while it’s hard to draw with a mouse, it’s easy when you use your fingers on a touchscreen.”

That realization led to Colorized, an iPhone app that facilitates “social sketching.”

Those of us covering startups use the word “disruptive” all the time–probably too frequently in some cases.

But it’s certainly the right descriptor for Your Mechanic, which sends a car mechanic to your home or office to provide repair and maintenance services at roughly half the cost of what you now pay at the shop.