https://atom.io/packages/move-tab-or-split

Move tab or split

Move your tabs around, and split to a new pane if there'r no panes in that direction.

When you move from a single tab pane, that pane will be removed.

Can move up, down, left, right.

Can't split if the tab is the only tab in a pane.

Usage

• You must first click body text for the shortcut keys to work. (Simply clicking the tab at top or hoping it will remember where you were last will not work.)
• "Special" tabs like Settings or a Markdown preview cannot be moved with this pluggin.

Shortcuts:

alt + ctrl + left

alt + ctrl + right

alt + ctrl + up

alt + ctrl + down