These are what I use (if I use Atom!). The Sublime Text 3 vs Atom Debate is still in full flow.
I like sublime as the bookmarks are easy to add, and my snippets all 91 of them are there too. Untill they have an easy way to convert them, I will probably stick with sublime.
Atom has some good features such as the linter is easier to set up and use, with more information, and packages are easy to add.
Sublime-Style-Column-Selection
atom-bracket-highlight
autoclose-html
linter
linter-jscs
linter-php
linter-csslint
local-history
minimap
open-recent
simple-drag-and-drop
split-diff
webbox-color
What do you use and why?