For Album Covers use this program https://sourceforge.net/projects/album-art/. - Source: Reddit / 3 months ago
Use this free program it can find HQ albums from like 12 sites only like 4 of there are worth using https://sourceforge.net/projects/album-art/. - Source: Reddit / about 1 month ago
TuneUp - TuneUp makes your music fresh and clean!
Neat Music - Neat Music Cleans Up Your iTunes Automatically! Cleans up iTunes in One Click
MusicBrainz Picard - Official website for MusicBrainz Picard, a cross-platform music tagger written in Python.Downloads · MusicBrainz Blog · Picard 2.
Tune Sweeper - Show duplicates in your Music library. Automatically select which duplicates to keep and delete based on your preferences. Remove duplicates with one-click from your iTunes or Music app library.
Album Cover Art Downloader - If your music library is missing cover artwork, then you need a free album art downloader to automatically seek and download album cover artwork.
Mp3tag - Mp3tag is a powerful and easy-to-use tool to edit metadata of audio files. DownloadDownload Mp3tag, a powerful and easy-to-use tool to edit .