This Image Browser plugin allows images on the server to be browsed and picked for inclusion into the editor's contents.
This plugin integrates with the image plugin (part of CKEditor), by making it provide a Browse Server button in the Image dialog window (screenshot here).
The way you use it is very similar to imageGetJson in Redactor - you only need to provide a list of images in a JSON format, and the image browser will take care of the rest.
See the Usage section to learn more.
For more information visit the official plugin page here