Music Library
Music library is a CDDB-enabled comprehensive music database manager designed for MP3 and record collectors. It lets you catalog any music files or media such as MP3's, WAV's, audio CD's, vinyl's and cassettes etc. with a MS Access database. You can use it to lookup ID3 tag information for MP3's... For record collectors, you can use it to keep track of your collections, besides the information retrieved from CDDB, you can also add personal notes, loan status, insurance, location, cost, and more.
http://www.wensoftware.com/download/mlsetup.zip - 6Mb - Download - Screenshot

Fair-Sound Audio DSP Plug-ins
What is Fair-Sound? The Fair-Sound Audio DSP plug-in provides loudness compensation, an essential element that is conspicuously missing from the Windows Media Player 9 Series. Have you ever noticed how a high fidelity recording sounds great when the volume is high but thin and weak when played... This characteristic of human hearing has been known since the days of vinyl recording, but it seems to have been largely forgotten in the digital realm. ... Fair-Sound employs a sophisticated system of intelligent filters to compensate for this nonlinear response at low volumes.
http://www.intricasys.com/fair-sound/setup.exe - 390Kb - Download - Screenshot