My Atom editor settings, preview: https://dl.dropboxusercontent.com/u/2206960/atom.jpg In addition you’ll need the following free fonts: "Input Mono Regular" & "Input Sans Regular" from http://input.fontbureau.com/download/

config.cson

'editor':
  'lineHeight': 1.45
  'softWrap': true
  'normalizeIndentOnPaste': true
  'tabLength': 2
  'preferredLineLength': 100
  'invisibles':
    'cr': '↩'
    'eol': ''
    'space': '·'
    'tab': '⇥'
  'showInvisibles': true
'core':
  'themes': [
    'atom-dark-ui'
    'blackboard'
  ]
'welcome':
  'showOnStartup': false
'whitespace':
  'removeTrailingWhitespace': true
  'ensureSingleTrailingNewline': true

styles.less

/*
* @viljamis’ Atom stylesheet
*
* This stylesheet is loaded when Atom starts up and
* is reloaded automatically when it is changed.
*/

/* CODE EDITOR
------------------ */
atom-text-editor {
  font-family: 'Input Mono';
  font-weight: 400;
  font-size: 16px;
}
atom-text-editor::shadow {
  .invisible-character,
  .indent-guide {
    color: #282c48;
  }
  .cursor {
    border-color: #ffbc91 !important;
    border-width: 2px;
  }
  .selection .region {
    background: #282c48;
  }
}

/* TOP TABS
------------------ */
.tab {
  font-family: 'Input Sans';
  font-size: 11px !important;
  letter-spacing: -0.3px;
}

/* SIDEBAR
------------------- */
.tree-view {
  font-family: 'Input Sans';
  letter-spacing: -0.3px;
  font-size: 13px;
  background: #2e2f35 !important;
  .entry.directory.status-modified > .header,
  .entry.file.status-modified {
    color: #ff6300;
  }
  .list-item {
    line-height: 1.8 !important;
  }
  .icon:before {
    font-size: 14px;
    opacity: .7;
    top: 0;
  }
  .header:before {
    opacity: .7;
    margin-right: 0 !important;
  }
}

Preview:

https://atom.io/packages/blackboard