DarkWave Studio is a free, open source, Digital Audio Workstation for Windows. Featuring a modular Virtual Studio, Pattern Editor, Sequence Editor and Multitrack Hard Disk Recorder. It has support for VST/VSTi instrument and effect plugins.
MetatOGGer makes it possible to rename, tag and easily classify your Ogg Vorbis, FLAC, Speex and MP3 files. You can add the support of other audio format via plug-in. The operations can be done manually or automatically by seeking information in a local database of several hundreds of thousands of discs (from MusicBrainz).
Tuniac Media Player is an iTunes style media player/manager for Windows. Supports: flac, mp3, aac/m4a/mp4/3gp, ogg, ac3, alac, ape, cdda, midi, mpc, ofs/ofr, tak, tta, wv and radio streaming support. Advanced playlist editor, search as you type and queue support.
foobar2000 is an advanced freeware audio player for the Windows platform. Some of the basic features include full unicode support, ReplayGain support and native support for several popular audio formats.
Drag and drop a bunch of mp3 files onto the AMP.EXE Icon and they will show up in the displayed listbox. Click Add to playlist and you can browse for the files to add and Multi select them to add.
Graphical interface (GUI) for the popular and very fast MP3 encoder & decoder - LAME. It offers easy access to all LAME parameters without the need for command line usage. The program offers a simple mode and an advanced mode which reveals additional expert options. Lame Front-End can work in batch mode, so it can be used by external applications to encoding/decoding files, e.g. by Exact Audio Copy, CDex.