I think that we are talking about two different things.
I am speaking specifically of "Templates", pre-made animations that allow you to drop in video and/or text. You may be referencing products like Jump Backs, the Editor's Toolkit line, Editor's Themekits, etc.
Generally, templates are specific to an application. Perhaps 90% (or more) of the commercially available templates are made for After Effects, with Apple's Motion taking the #2 spot, as far as I can tell.
Review the videos of these product lines to see what I am talking about:
ready2go:
http://www.digitaljuice.com/products/product_lines.asp?plid=306
ToxicType:
http://www.digitaljuice.com/products/product_lines.asp?plid=327
Also check out the After Effects templates from Rampant Design Tools for more examples: rampantdesigntools.com