winLAME is an encoder for several audio formats, including mp3 (MPEG Layer 3), Ogg Vorbis and more. winLAME lets you set up the encoding process with an easy-to-use wizard-style user interface.
winLAME supports many input audio formats, and uses the LAME mp3 encoding library for encoding and the MAD decoding library for decoding. Feature [...]

MediaInfo supplies technical and tag information about video or audio files (MKV/AVI/MPEG1, 2, 4/MP3/AAC/… There are several versions: Graphical interface, Command line, or DLL for third-party software developpers (like emule).  GUI is multi-language.    This is a major release: a lot of format support (3GP, DTS-HD, Musepack, Quicktime HD…)    This is a MS-Windows [...]

Windows only: Free program Process Explorer, by the good people at Sysinternals, is a Windows Task Manager replacement tool with all kinds of added functionality.
Ever wondered which program has a particular file or directory open? Now you can find out. Process Explorer shows you information about which handles and DLLs processes have opened or loaded.
The [...]