TagScanner (AKA: Tagscan) is a professional and powerful music file tag intelligent recognition and modification software developed by Sergey Serkov from Russia. It can utilize music file's tag info to automatically rename the music files in batch, or import tag information from the file name and other sources. In short, TagScanner is highly intelligent and automated. Even better, it's totally free, portable and very small.

mpTrim (formerly called mp3Trim) is a compact and convenient MP3 audio file cleaning up, trimming, amplifying and fading-in/fading-out tool from Germany. We can use it to reduce the file size of MP3 music without quality loss; to remove unwanted noises or mute sounds from MP3 file; to adjust the sound volume of MP3; to cut your favorite MP3 and use the clips as your personalized ringtone; and to make a music clip with a fade/fade effect for later merging with other music clips or showing as a demo, etc.

MusicBrainz Picard is a revolutionary music sorting software developed by MetaBrainz Foundation, it's free, open-source and cross-platform. First use of it, maybe you feel its UI is so weird, but once get started, you will find that's really reasonable and user-friendly.

Mp3tag is a lightweight, universal (supports 15+ audio formats) audio file ID3-Tag info editor. It's specially designed to help user to fast edit all ID3 info in music file in batch, including title, artist, album, year, genre, composer, cover, etc., which is convenient for user to identify and manage music files.

mp3DirectCut (with the same author of 1by1) is a freeware audio editing applet that can be used to cut extensive music files without quality losses and split, developed by Martin Pesch from Germany. It graphically shows clearly the wave form of MP3 file, which allows you to quickly and accurately get the break point to cut.