Zoomify.

Zoomify HTML5 Enterprise for Windows (XP and newer). Includes everything in Zoomify HTML5 Express and Zoomify HTML5 Pro plus powerful enterprise-grade imaging features!

Features sophisticated web-based annotation editing of shapes, freehand drawings, polygons and measurements, slide view with support for up to 30 z-stacked images, user logins, tracking counters, the ability to save to file, IIIF-compatible preview, image filters for brightness, contrast and more! Also included is the Zoomify Narrative Authoring Solution – for intuitive, integrated editing of narrative text, annotations and deep image links, plus integrated file management – and all without any web page editing! Full editable JavaScript source code for the Viewer is included.