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   * [whimsical.com](https://whimsical.com/) - Collaborative flowcharts, wireframes, sticky notes and mind maps. Create up to 4 free boards.
   * [Zeplin](https://zeplin.io/) — Designer and developer collaboration platform. Show designs, assets and styleguides. Free for 1 project.
   * [Pixelixe](https://pixelixe.com/) — Create and edit engaging and unique graphics and images online.
+  * [Responsively App](https://responsively.app) - A free dev-tool for faster and precise responsive web application development.
 
 ## Data Visualization on Maps