What is Int
Int extension is related to SGI Integer Image files. You can try to open int files with ACDSee software.
These are black and white images. Int extension stands for monochrome. This file format was developed by Silicon Graphics firm. The images of the same firm are found with .sgi file extension. You have chance to open int files with xnirfan software. Besides, int files can be opened by Acdsee program.
Here is the web page to get detailed information.
Viewer or Converter for Int
Which pages about Int