What do the Indigenous Mapping Network, the Global Oneness Project, Trees for the Future, Women’s World Banking, Bioneers and the Ocean Medicine Foundation have in common? And what do you have in common with all of them?

They’re all on WiserEarth—and you should be too, if you count yourself among the legions of “people, nonprofits and businesses working toward a just and sustainable world.” WiserEarth is a free online platform and database focused on “Connecting Communities of Action,” and that includes myriad people, organizations and ideas who probably never knew they should be connected in the first place.

WiserEarth has become the go-to site for anyone seeking information about social activism, sustainability, justice and a host of related fields. It currently includes profiles of more than 111,000 organizations worldwide, more than 28,000 individual users, and hundreds of jobs, events, discussion groups and resources related to social and environmental change. Any user can create a profile, upload resources and project descriptions, and add links to organizations and initiatives with which he or she is involved. That user-friendly interface makes it easy to see how tools and ideas from one discipline or geography can be easily applied to others, and to skip from one great idea to another, and another, and another...

Spend an hour exploring WiserEarth and you may feel your universe expanding ad infinitum; the number of organizations and initiatives working for social change is truly mind-boggling. But with luck, you’ll also feel your world getting smaller with the realization that you’re tied to so many more of them than you thought. Either way, the site earns its name: you’ll be amazed at how much you have to learn and offer.