Zeplin.io

It’s free pub for them but they certainly deserve it !  All of you dev out there you need to try this.  Pick you project PSD or Sketch, import it and enjoy.

  • Easy asset integration
  • Code generation for UIColors and UIFont extensions used in the PSD
  • Measurements for everything in point ‘pt’
  • Comments on UI elements between users

Downside … a little bit expensive in my humble opinion.

Zeplin.io

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