Routlets is based around the Eclipse framework, known to many in the software development community. This provides a good editor and an integrated environment around it, in this case adapted to work with Junos configuration files.
Besides the topics already mentioned in this tour, the editor in Routlets provides:
Hot keys
Network engineers can spend a lot of time browsing and maintaining routers. To make this as efficient as possible, keystrokes are provided for most operations. At any time the Key Assist panel can be shown to find a keystroke (and often discover new features of Routlets in the process).