There is only one file type that uses the .VYM extension:
VYM Mind Map File
File created by VYM (View Your Mind), a multi-platform mind mapping program; can store ideas, tasks, topics, keywords, and other information; used for visually representing concepts and ideas in a creative way.
VYM files can also store scripts that customize how information is processed and visualized.
NOTE: VYM files are .ZIP files that contain an archive of mind map data files.
Updated: October 27, 2012