MP3Gain is an audio normalization software tool. The tool is available on multiple platforms and is free software. It analyzes the MP3 and reversibly changes its volume. The volume can be adjusted for single files or as album where all files would have the same perceived loudness. It is an implementation of ReplayGain
MP3Gain first computes the desired gain (volume adjustment), either per track or per album, using the ReplayGain algorithm. It then modifies the overall volume scale factor in each MP3 frame, and writes undo information as a tag (in APEv2, or ID3v2 format) making this a reversible process. The scale factor modification can be reversed using the information in the added tag and the tag may be removed. MP3Gain does not introduce any digital generation loss because it does not decode and re-encode the file.
MediaHuman Audio Converter is a freeware application for Mac OS X and Windows. It can help you to convert your music absolutely free to WMA, MP3, AAC, WAV, FLAC, OGG, AIFF, Apple Lossless format and bunch of others.
MediaHuman Lyrics Finder is a free software application, which can help you find and add missing lyrics (song text) to all songs in your music library. It's a safe operation because the app doesn't overwrite lyrics you've already had.
Very easy to use: simply drag&drop some tracks from your favorite music player (e.g. iTunes) and MediaHuman Lyrics Finder will do the rest.
MediaHuman Lyrics Finder will give you access to over a million different lyrics collected from various sources on the Internet.