Packages make Pulsar do amazing things.
tool-bar-markdown
A stripped atom-tool-bar plugin fitted for markdown writing & note-taking.
atom-math
Atom package for evaluating simple mathematical expression using Math.js
open-files
This package adds an 'open files' pane above Atom's tree-view, mimicking the functionality of Sublime Text
markdown-preview-plus-opener
Opens the markdown-preview-plus pane automatically when a markdown file is opened. Forked from plafue's markdown-preview-opener. They really did all the work.
xeta-syntax
A custom syntax theme based on Peacock theme for PHP, HTML, CSS, SCSS, LESS, JavaScript, JSON, YAML, Markdown, Python, Ruby, SQL, CoffeeScript and XML.