There is only one file type that uses the .OPEICO extension:
Opeico Text File
An OPEICO file is a text file created by Opeico File Viewer, a simple text editor. It contains plain text typed by the user that may be formatted with fonts and colors.
Opeico File Viewer is used for creating and editing OPEICO files. It provides basic editing functions such as cut, copy, and paste and allows you to format the font and color of the text. It also allows you to save the text file in the Zsqxl binary text format.
|Opeico File Viewer||Free|
Updated: December 17, 2016