Ocean Software's internal sprite editor written for Atari ST development system. Includes EDWRK / EDSPR sprite-editor, EDMAP map-editor and in later releases COMPUTE map processor. Release 3.0 is the last known version with a title EDWRK.
It was used at least for WEC LeMans (ZX Spectrum), Chase HQ (ZX Spectrum, Amstrad CPC), Batman The Movie, Operation Wolf, Rambo III (16-bits) and others.
If you look at the Ocean games disks with unpacked file extensions SPR, WRK, BLK and MAP you can actually load up and edit sprite and gamemap data with this editor.