Generator

  • Built into Photoshop CC (version 14.1) or later.
  • Turn it on, rename layer and groups, assets are created.
  • Super simple, more info here and at GitHub.

xScope


Skitch

  • Now a part of Evernote.
  • There is also a mobile version for iOS and Android.

Typekit

  • Included with a Creative Cloud subscription, affordable as a stand alone purchase.
  • Supported by almost every website service ever!
  • Easy to use, does require a little CSS knowledge.

Dreamweaver

  • If this is the only text editor on your computer, then it’s a fine one for you to use. Just keep it in code view.
  • Comforting visual CSS editor, auto complete
  • Lots of templates and layouts built in.