Mp3tag is an audio tagging utility that supports many formats with batch tag-editing of ID3v1, ID3v2.3, ID3v2.4, iTunes MP4, WMA, OGG (Vorbis/Opus), etc.
Furthermore, it supports online database lookups from, e.g., Discogs, MusicBrainz or freedb, allowing you to automatically gather proper tags and download cover art for your music library.
