Enhanced Simplex

Enhanced Simplex (or is it Enhance Simplex?) (ESM) is a raster graphics format. It is possibly associated with the TMS Cranach Studio or TMS Cranach Paint graphics software for Atari ST computers.

Identification
ESM files apparently begin with the signature.

Software

 * GEM-View
 * ESM-Save module source code
 * Konvertor
 * XnView
 * Atari ST Plus Picture Viewer (2014 archive)
 * Rest7 Online Image Converter
 * RECOIL

Sample files

 * FLOWER.ESM
 * https://telparia.com/fileFormatSamples/image/esm/