Search Atom packages.

vtab

Verticalize tabs on Atom.
1000ch
250

resizable-vertical-tabs

Display tabs vertically in a resizable panel.
amblard
229

vertical-tabs

Make your tabs vertical
tiger4th
8,915

vertical-tabs-right

Make your tabs vertical at the right side of wokrspace. Fork of the https://atom.io/packages/vertical-tabs.
PFight
531

vertabs

Vertical tabs over file tree (SublimeText-like)
and3rson
200

rulerz

Mark each cursor with a vertical ruler.
forgecrafted
5,973

expand-selection-to-indentation

Expands vertical selection based on the indentation of the current line
Overload119
300

vertical-tabs-plus

Makes tabs vertical that can also be placed over project tree panel. Fork of the tiger4th's vertical-tabs package
OddMorning
2,450