Synapsen is a hypertextual card index or reference organizer, especially designed for BibTeX, and offering support for the requirements of BibLaTeX.

The Software is written in JAVA, and runs on all major operating systems (Windows, Mac OS X, Linux, Unix).

The software features automatic or individual connections between cards; direct search and download from public bibliographic sources; fully compliant BibTeX output for LaTeX; support for word processors via RTF output; Unicode support; support for SQL database to secure future accessibility of data.

The author is Markus Krajewski. The package is Copyright © 2007 Markus Krajewski.