BibORB is a PHP app that allows you to administer your BibTEX references online. It makes it easy to share references with coauthors and to jointly build a BibTEX database. 

This a project with GNU General Public License 3.0.  It was developed by Guillaume Gardey around 2004. This is a fork from Gardey's last public version 1.3.3 with the following changes:

• The program runs under PHP 5.3+
• The default login now uses Google OAuth2.0 - you can get a free key from the Google cloud console (see installation instructions).

The code is available through Github