Enhanced Simplex

Enhanced Simplex (or is it Enhance Simplex?) (ESM) is a raster graphics format apparently associated with Atari ST computers. Its origin is unknown.

Identification
ESM files apparently begin with the signature.

Software

 * GEM-View
 * ESM-Save module source code
 * XnView (unconfirmed)
 * Atari ST Plus Picture Viewer (2014 archive)