Wikipedia
stock.xchng (also known as SXC) is a website providing free-to use stock photography and illustrations, its name being a reduced version of "stock exchange" (meaning the exchange of stock photography, and a play on the term stock exchange). The site was launched in February 2001 by Peter Hamza, and allows users to contribute, share and download high-resolution photographs and illustrations free of charge. Contributors are encouraged to submit material to enhance their photography career through wider public exposure. In 2009, the site had over 2,500,000 registered users (1,000,000 in the USA alone) and more than 400,000 photos. Until 2009 it operated parallel to its sister site, Stockxpert.com, until the site's parent company, Jupiterimages, was purchased by Getty Images, and the site is now tied in with the iStock library of paid images.
Since its acquisition by Getty Images in 2014, the site was renamed FreeImages in 2014 and the web address now redirects to a freeimages.com URL. It has retained the older SXC images and the link to the iStock website.