Apps with 'Edit metadata' feature
Calibre is a free and open source e-book library management application made by users, for users. Many languages, designed around the concept of the logical book, i.e.
Mp3tag is a metadata editor for audio and video files.
FileBot is the ultimate tool for organizing and renaming your movies, tv shows or anime, and music well as downloading subtitles and artwork. It's smart and just works.
Self-Hosted Bookmark and Archive Manager. Bookmark links and edit its metadata (like title, tags, summary) via web-interface.
Sayonara is a simple but nice audio player and holds a lot of features like a library, id3 tag editor, equalizer, lastfm radio, lastfm scrobbler, stream recorder and so on...
PDF Shaper is a feature-rich PDF software that makes it simple to split, merge, update and improve PDF documents.
Nero MediaHome is the universal media center for archiving, organizing, creating, and play back your files.
EZ CD Audio Converter is the most comprehensive multi format audio converter and is extremely easy to use.
Metadata++ 1.07 .5 (freeware)Windows 10 SupportMetadata++ works seamlessly with both 32-bit and 64-bit Windows 10, 8.1, 8, and 7.Performance
Exiv2 is a C++ library and a command line utility to manage image metadata.No screenshots yet
Automatically tag faces in photos and identify them on your local windows system, without sending data to the cloud.
Exif Pilot is a Free EXIF Editor that allows you to manipulate META data within image files.Features:* View EXIF, EXIF GPS, IPTC, and XMP data.
GPicSync automatically inserts location in your photos metadata so they can also be used with any 'geocode aware' application like Picasa/Google Earth, Flickr, loc.alize.
Genialist Media Server lets you organize and stream all your medias from one place on your home network and beyond.
Edit & download ID3 and MP4 tags, rename audio files on Mac OS X easily and quickly. Free download from Mac App Store at https://itunes.apple.com/app/tag-editor-free/id984278082.