I've been using
HTML::Template for almost two years now. I agree with princepawn that it does separate Perl from HTML for the most part. One thing that I can't stand is seeing HTML bloating code like an overfed pig. Sam Tregar, its writer has done a fantasic job of making a feature rich module making it easier for webmasters to do their job without realy having to bang their head against the wall trying to decipher what the code is and does. One of the main reasons I like HTML::Template so much is that it goes very well with mod_perl. Its ability to cache templates is invaluable. Creating and using tags from it is simple, yet you can make very complex pages out of it. The person who is marking up the pages, all he/she has to do is understand the tags defined by the programmer and how to arrange them.
in reply to Web Application Frameworks and their Templating Engines with a Comparative Study of Template and HTML::Template