MetaProducts Integra - description from Softdepia.com:
MetaProducts Integra is an application that monitors file downloads initiated by your browser and sends this download to the selected download manager. Integra uses HTTP and FTP proxy technologies to listen to browser traffic and catch the beginning of the file download.
Integra allows you to use your favorite download manager with any type of browser. (Proxy server support is required for the browser.)
Integra supports the following download managers and offline browsers:
Download Accelerator Plus
Intertnet Download Accelerator
Offline Explorer Pro
MetaProducts Integra is a "Free to try" program. You can download and try it for an evaluation period.