Tension Software has released URL Extractor 4.0 (http://tinyurl.com/q3wzkdx). URLs can be now extracted from PDF files (both locally and online). The design has also been tweaked.
URL Extractor is a Mac OS X app for extracting emails address and generic URLs from files on the HD or directly from the web using a list of “starting” web addresses and working unattended after the startup. You can retrieve and start search from web pages using keywords from various international Google sites.
URL Extractor can extract thousands of URLs from the web starting from a single web page and using “cross navigation” and extraction. It requires Mac OS X 10.7.3 or higher and costs US$50.