Update: I've added PostgreSQL support by using PDO. I've bumped the version to 1.0.0.
CallerList is a call screening application used by The Atheist Experience, a public access TV show in Austin, TX. The original concept and implementation was by Linda Raymond of Houston, TX. I rewrote CallerList so that it would be AJAX based instead of post/form based. I'm now the maintainer of CallerList.
It's possible that there will never be any interest in this application outside of ACA, but in any case you can download it here