The Image Gallery plugin, developed by dmitry_fedyuk, allows users to create galleries with multiple images. The plugin has undergone several updates, with the latest version (3.1) released to ensure compatibility with Discourse version 1.7.0.beta9. dmitry_fedyuk has also released other plugins, including Paid Membership, PayPal Buy Now, Restrict Files, Real Name, and Table.
dmitry_fedyuk has provided screenshots and examples of the plugin in action. However, some users have raised concerns about the plugin’s functionality, with Overgrow reporting issues with the demo and dylanh724 questioning the plugin’s price ($599) given its last update in 2015.
dmitry_fedyuk has clarified that the plugin is translatable, developed, and supported, and has offered to install it for customers. However, Overgrow has expressed frustration with the developer’s response to reported issues, citing a “chicken-egg problem” where the developer requires payment before fixing issues.
Version 2.0 is out!
Now, each gallery image has its own unique url.
An example: «Gallery» plugin (version 3.1, 2016-12-11) - Discourse Plugins
So a particular image can be shared and referred in discussions.
When a visitor clicks Prev and Next gallery arrows (or keyboard keys), the browser url is updated automatically without page reload.
but great work for this plugin 
