SpaceShare Green Travel -- carpool, community building
SpaceShare Green Travel builds ride- and room-share tools for festivals and conferences. Our sister effort Verdant Event builds complete websites for conferences with greening tools integrated.
Companies providing some of the services required for a green event are expanding very quickly -- and often you'll want to look more local than this guide allows. Googling may be your best bet, but as we find higher-quality information we'll put it here.
And looking for resources to green your contribution, check out Blue Green Meetings starting point for companies supplying the events industry.