Support for AC3 Decoder is available from the publisher site.
Short description: An easy-to operate tool for converting AC3 and unprotected VOB format files to PCM WAV, MP3, WMA and Ogg Vorbis formats. As a result, the listening sensation is much more natural, with sounds appearing "out-of-head"....
To speed up your downloads we recommend you use a download manager such as 
Mp3tag is the universal Tag editor. Mp3tag enables you to edit and remove tags of your audio files, import from online databases, generate filenames based on tags (and the way back), Capitalize, lowercase and UPPERCASE filenames and tags and more...
Melomania is a handy music collection software for Windows, which allows you to catalog music collection of any kind, from vinyls to MP3s, and provides you with a quantity of facilities to manage music database.
Convert video files from one format to another, and extract audio tracks.
Cool Radio Recorder - Internet Radio to MP3 in 100% quality - Easy, Solid and Simply Cool. Record rare music and talks from underground stations or just tune into your favorite internet radio and listen. 3000+ stations included.
Automuter is an application that stays in system tray notification area (near windows clock). It can mute speakers when computer is locked, when screensaver is running. Alternatively, you can set up you own silent time schedule or mute by hotkey.