There’s a new open source project called Marathon that’s designed to let users intelligently run a wide variety of their applications and services — Hadoop, Storm and even standard web apps — on the same set of servers. Marathon comes out of an early-stage startup called Mesosphere that’s aiming to build a data center operating system on top of the Mesos cluster-management software that’s a key part of Twitter’s infrastructure. The company’s founders are former Airbnb engineers Florian Leibert (who also worked at Twitter) and Tobias Knaup.