What I find frustrating is that we write these tools for each individual file format. Calibre for tagging books, this tool for tagging music, another tool for tagging images. This stuff should probably be supported directly for all kinds of files in the operating system.
Windows can read/edit ID3 tags and many other types of metadata formats. It's hidden away in the details, but you can select those columns to show in a details directory view.
There's certainly no nice bulk tagging functionality, however.
