Catalog Maker by EasyCatalog

Great app to create a PDF catalog of the products on your website. Has a lot of customizing options. Also let's you to update the catalog without having to create a new one, so you can keep the same link for the catalog.
We're still trying to figure out how to update a catalog of a collection after changes have been made to the collection (e. g. products were added or removed to the collection, change in name of the collection).