Web Browser Tools/Plugins
Some recommended download managers include:
|Operating System||Download Manager||Note|
|For All OSes||Firefox add-on: DownThemAll||This is probably the best/simplest plugin.|
|For Windows||FDM (Free Download Manager) and Stardownloader|
|For Mac OS X / Safari||Speed Download||Retail price is about $25.|
Download managers provide an easy-to-use GUI for downloading multiple files in parallel, for monitoring download progress, and for pausing/restarting downloads. Most support uploads as well, and some such as 'Free Download Manager' even support bittorent downloads.
* For more information, Wikipedia maintains a comparison table of download managers.
Other Browser Tools
Globus Online is an easy way to perform GridFTP-based transfers from a web browswer.