Clojure’s focus on immutable data and sequences have been the inspiration for building new data tools for uSwitch.com: treating everything as data and building many tools that operate on the same data.
It has helped us build monitoring, debugging and analytical tools (many of which are written using Clojure) that help us understand how people are interacting with our websites and provides an open-source, open-schema environment for our data that encourages both consumption and production.