OpenStack Swift is an open source, scalable object storage system for storing unstructured data. It was initially developed by Rackspace in 2010 and is now developed by many contributors including Rackspace, HP, eNovance, and Swiftstack. OpenStack Swift uses a REST API and has features like static website hosting, quotas, geo-replication, and automatic object expiration. It sees production use by companies like Wikipedia, Rackspace, and Disney for storing large amounts of unstructured data.