Ess extension is related to EasySpreadsheet table file. You have chance to open ess files with Easyspreadsheet software.
Ess files can be used in table and formula calculations. Ess extension is part of Easy Office software and there are similarities between excel and ess files.
Ess is Excel compatible program and you may open old kind of excel files with this software. You can get detailed information from following link:
What to use ess
which page related to ess file
ess Related Searches
You can check related links about ess fileextension.