Questions specific to elementary OS 0.3, codenamed "Freya". Freya has been superseded by Loki.
Freya is third stable version of elementary OS which has its own desktop environment, called Pantheon.
Pantheon comes with its own set of applications:
Slingshot (application launcher),
Midori (web browser),
Geary (email management software),
Pantheon Terminal (terminal emulator) and
Pantheon Files (file browser).