This shall be the place to find both usage documentation and in depth tech background for our open source DataMatrix ( 2d barcode) decoder.
It is a .net (C#) component, ready to use to decode DataMatrix from bitmaps, for example shot with a cheap webcam. It's licenced as open source under the GNU General Public Licence.
libdatamatrix is an embeddable and highly extensible library made to separate datamatrix (ISO/IEC16022) functionality from image reading/writing since I needed to make a custom image scanner and couldn't find any libraries that did error correction (instead of just error checking) and had a modular interface allowing one to extend functionality easily.
libdmtx is a shared library for Linux that can be used to read (scan & decode) and write (encode & print) 2D Data Matrix barcode symbols. It is released under the LGPL and can be used and distributed freely under these terms.
Type in title and author, and all data on your book is automatically download from national libraries and online bookstores (like Amazon or BN.com). Can capture book cover images. Your book database will be searchable.