BlueSpace has several MLS applications, including an MLS email client, an MLS search application and an MLS C2 system. BlueSpace leverages a middleware strategy to enable its applications to be platform neutral, orchestrating one user interface across multiple Windows OS instances (virtualized or remote terminal sessions). The US Naval Research Laboratory has also implemented a multilevel web application framework called MLWeb which integrates the Ruby on Rails framework with a multilevel database based on SQLite3.