EDM, the Extensible Display Manager, is used at many EPICS sites to create reliable, fast displays. It is based on X11/Linux and provides both an editor for creating pages and a runtime for displaying them.
WEDM, a JLab development, is a web runtime for EDM pages. It uses the same configuration files as EDM and creates very similar displays for most widgets.
The SNS Web EDM link provides read-only access to SNS EDM screens. It requires UCAMS user/password.