The application is available as a MAC OS app for $15 and allows for a five days trial period.
Free plug-ins for the browsers Safari or Chrome are available, but will only work with the full application installed. The plug-ins insert a download button in the browser’s tool menu.
Safari extension: http://www.tastyapps.com/category/portfolio/safari-extz/
Contact: Niels Brügger; nb (at) cc.au.dk