daDrill

daDrill is a web-based graphical tool for managing a collection of bibliographical references. daDrill allows the user to add references, browse the available references, query the database for keywords. In addition, daDrill automatically indexes author names when adding a reference, so papers can also be grouped by author.
daDrill is made to be compatible with the BibTeX format. New entries can be entered by copy-pasting a BibTeX file. Entries are internally stored by preserving all BibTeX fields. Moreover, each entry can be re-exported as a well-formatted BibTeX string. Author names that are automatically added are automatically split into 4 parts in the same way as BibTeX does.
In addition to standard support for all BibTeX fields, daDrill also offers a few extended features. A plain-text/Markdown comment can be entered for every reference, thus providing additional annotations for the user of the database. In addition to the regular URL BibTeX field, daDrill allows the user to store a reference to a local PS or PDF file. In the "paper details" view, an clickable icon links to the local file that can be immediately opened.
The entries are stored in a MySQL database. The web interface is written in PHP and uses either the \'mysql\' or the new \'mysqli\' PHP module. Although the system can be used remotely without any modification, it is principally intented for a local use; in such case, a web server such as Apache is needed with the PHP module, along with the MySQL server itself.