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

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.