Yahoo is a well-known user of, and contributor to, open source projects. The company is most closely associated with Hadoop, and rightly so, as it is this open source project's biggest contributor. Last month, it sponsored the Hadoop Summit 2011, in which its internal Hadoop experts, and others, ran a collection of workshops on the distributed workload operating system. It even announced that Yahoo had collected some top Hadoop engineers and spun off a new company, Hortonworks. Hortonworks hopes to sell Hadoop consulting services to enterprises.