You can install this small atom.io extension in the
Preferences... > Install dialog OR with the atom package manager:
apm install show-in-system
This extension adds new sub menu entries to the context-menu of the file/project tree and the editor tabs.
Show in Finder / Explorerto each editor tab.
Open in Terminalfor folders and files (scripts) in the file tree and tab context-menu. Current this is an OSX-only feature. Pull requests for other systems are welcome.
Open with default applicationin the file tree and tab context-menu.
Good catch. Let us know what about this package looks wrong to you, and we'll investigate right away.