Barada - Two-Factor Authentication For Android
barada.sourceforge.net
From the page
Saved with the link. Notes from 2007 to 2016 are mostly the page's own words, so this is probably an excerpt.
Barada turns your phone into a two factor authentication device. It's an implementation of the HOTP protocol in the form of a PAM module (the server) and an Android applicaton (the client).