Dexter is a little java program to interactively or semi-automatically extract data from scanned graphs. In its applet incarnation it is used by the Astrophysics Data System. A rudimenary standalone version is provided as well.
PaperScope is a graphical tool for exploring the data holdings of the Astrophysics Data System (http://adsabs.harvard.edu/). It enables the user to explore the relationships between Astrophysics papers and locate papers of research interest.