Top 4 imageviewer open source projects

A simple and customizable Android full-screen image viewer 一个简单且可自定义的Android全屏图像浏览器

A simple and customizable Android full-screen image viewer with shared image transition support, "pinch to zoom" and "swipe to dismiss" gestures

SwiftyBase - A Swift library for Create Project in iOS ( Base Project)

a pure javascript library to view image and support touch, pinch and mousewheel