Sketch Measure - Spec tool for developers and teammates
AppReviewDesk - App Review Exchange, Free App Websites , Twitter Marketing for apps.
Zeplin - Collaboration app for UI designers & frontend developers
Review Lancer - Reviewlancer also provide a platform for Developers or Marketers to free exchange app reviews and ratings. Now market your app for zero budget.
Marketch - Marketch is a Sketch 3 plug-in for automatically generating html page that can measure and get CSS...
Reviewsmotion - In Reviews Motion you will be able to get reviews for your iOS and Android apps in a fast and simple way.Increase the downloads and the earning of your apps