A sitf file extension is associated with the IconToolkit and used for its data files.
SITF file extension - IconToolkit data
What is sitf file? How to open sitf files?
File type specification:
The sitf file extension is related to the IconToolkit, an icon editing software for Microsoft Windows operating system, developed by Seanau.
The sitf file contains some kind of data used by this program.
This sitf file type entry was marked as obsolete and no longer supported file format.
This type of file is no longer actively used and is most likely obsolete. This is typically the case for system files in old operating systems, file types from long discontinued software, or previous versions of certain file types (like documents, projects etc.) that were replaced in higher versions of their original programs.