Bibtexbrowser is "a PHP script that creates searchable publication lists from bib entries of BibTex files". The great thing about it is that you just need to upload your BibTeX file to the server and... voilà, your publications list is updated!
Also, for researchers with lots of publications, bibtexbrowser provides a very rich filter set that includes authors, years, type of publication and keywords. Yet another great feature is that it can be included in your webpage (see my own publications page) or generate independent web pages. It can also be tailored to your web page style.
There is just one thing missing to bibtexbrowser: an RSS feed, so that I can subscribe to someone's publications and be kept up to date! That would the cherry on top of the cake. Martin, if you see this post, please consider it a feature request, and thanks for the great work on this!
EDIT: Forgot to mention another great feature: bibtexbrowser consists in a single PHP script that you have to upload to your server. No database is necessary (other than the bibtex .bib file)!