ZXing (pronounced "zebra crossing") is an open-source, multi-format 1D/2D barcode image processing library implemented in Java. Our focus is on using the built-in camera on mobile phones to photograph and decode barcodes on the device, without communicating with a server. We currently have production-quality support for:
Axis2: Why bother? The Axis team is kicking up a big fuss about their recent release of Axis 2 (1.0!) Surprisingly, this library is so so abysmally bad, that I have yet to find someone who has managed to successfully use it.
A Java Audio File Tagger , using the freedb online database for the retrieval of the tags, released under the (L)GPL license. It supports custom file renaming from tags (with any directory stucture) and vice versa. Supports: mp3, ogg, flac, mpc, ape,wma