I found this piece of text on their website, and I surely agree with it...

Great speed download manager
Orbit downloader is an indispensable tool for download acceleration which can download up to 500% faster.

Super light:micro-sized and resource-friendly
Orbit downloader is written with efficiency in mind - it typically uses less than 3MB of memory, allowing you to use the computer without noticing Orbit downloader is running. Additionally, the installation package is less than 1.6MB.

Easy to use and config
Orbit downloader supports IE, FireFox, Maxthon and Opera. You can easily download files with a browser click from any remote server via HTTP/ HTTPS/ FTP/ RTSP/ MMS. Orbit downloader's easy-to-use management features and simple-yet-powerful configuration options can make both your downloading process and downloaded files management as easy as never before.

Use as RapidShare downloader
Orbit downloader can make your downloads from RapidShare.com much faster, safer and more stable. Additionly, Orbit downloader supports most of file-sharing service websites, including megaupload, badongo, sendspace, sexuploader, yourfilehost, uploading, filefront, 4shared, turboupload, depositfiles, filefactory, more....

Use as Youtube video downloader
Orbit downloader can download Flash videos ,including stuff from Youtube, Google, MySpace, MetaCafe, DailyMotion, etc.

Catch flash/streaming Media
When you hover your mouse on the flash or streaming media file in the webpage,Orbit downloader can recognize the flash or streaming media automatically and display a small button on it. You can easily download the flash or streaming media file with one clicking on the small button.

Use as Metalink downloader
Orbit downloader supports Metalink download and gives you extremely fast download speeds.

Code:
Website: http://www.orbitdownloader.com/
Download: http://www.orbitdownloader.com/download.htm
Screenshot: http://www.orbitdownloader.com/img/a1.gif