RandomFill randomizes the collection of MP3s to be sent your portable player or software media player. It's most powerful feature is the ability to assign weights to folders: you can set some folders to be often selected from, rarely selected from, or ignored.

The program looks for MP3s in recursively scanned folders and/or M3U playlists, and either copies them for downloading into your portable player, or creates a playlist for your software player. The number of MP3s selected can be set to either a maximum size of them or a maximum playing time.