SEGGER Ozone is a piece of software that is meant to debug an already-written application. Ozone is independent of the underlying programming environment used to create the application. It can be used in many different modes, but we'll focus on importing an *.elf file and crossreferencing it with source code to provide FreeRTOS-aware debugging capability to a project created with any toolchain. Let's take a quick look at the various file types we will be working with in Ozone.