MP3 Diags, © 2008-2013 Marian Ciobanu (Ciobi), is released under GPL V2

Using Qt, released under LGPL 2.1

Using zlib, released under the zlib License

Using Boost Serialization and Boost Program Options, distributed under the Boost Software License

Using original and modified icons from the Oxygen Project for KDE 4, distributed under LGPL V3

Using web services provided by Discogs to retrieve album data

Using web services provided by MusicBrainz to retrieve album data