Excuse me, I meant Add-Ons, not plugins.
Illimitux 3.2.
This tool removes the limitations from Rapidshare, MegaUpload, MegaVidio, Veoh, etc.
Another Add-On I recommend is Download Helper 4.6.4.
Salburg Cathedral - The Official Gust Guild
The Official Atelier, Ar tonelico, Mana Khemia & Gust Games Guild