The bibutils program set interconverts between various bibliography formats using a common MODS-format XML intermediate. For example, one can convert RIS-format files to Bibtex by doing two transformations: RIS->MODS->Bibtex. By using a common intermediate for N formats, only 2N programs are required and not N²-N. These programs operate on the command line and are styled after standard UNIX-like filters.
The bibliography conversion service lets you convert your BibTeX or EndNote bibliography to BibTeX, EndNote, HTML, or Silva XML. For an example of an HTML bibliography, please visit dret's online bibliography, which has been generated from BibTeX. Note the OpenURLs, which enable users to simply look up the ETHZ library catalog for this particular resource. When generating HTML, this OpenURL resolver (and many other options) can be configured to generate customized HTML.