ProductionCrate offers a free Ae script for Lower Thirds with over 100 templates.

A newly updated and free script from the folks at Production Crate offers users over 100 lower-third templates you can use in your work.

ProductionCrate’s FREE Lower-Thirds Script for After Effects has over 100 customizable lower-third templates in the collection. Users can download this script after signing up for a Free or Pro ProductionCrate account.