OpenSym (formerly WikiSym) has been sponsored in the past by many different organizations, including the Wikimedia Foundation, Creative Commons, Google, Microsoft, WikiHow, About Us, CosmoCode, XWiki, TWiki, Kaltura, University of Porto, University of Michigan, and the NSF. Please see the annual instance as to who sponsored OpenSym when.
If you are looking to sponsor or support the Open Symposium, please contact us. We welcome your inquiry and will be happy to work with you.