If your PC is in the LAN containing 10 computers - MP3Finder can be useful to
you, if your LAN contains about 50 PCs - you may need MP3Finder, if more -
MP3Finder is absolutely necessary to you. The first thing that you possibly
will want to find is MP3-files in your LAN, second one - video-files, third
one - some installations (to avoid downloading ones that already have been
downloaded).
MP3finder is a handy tool to scan your LAN for files.

Main Features:
Fast - MP3Finder uses multithreaded search engine;
Configurations - for most frequent searches; Flexible search - limiting
PCs, Shares, Files by supplying include/exclude masks; Save/Load to/from XML;
Export to XML/HTML/Text; Flexible display of search results; Playback of
MP3-files (Winamp, Sonique, RealPlayer, MediaPlayer); Find text in search
results; Hidden shares - on NT/2000/XP MP3Finder can search hidden shares;
Search statistics.