D/L Manager I use Hidownload Manager and it works well for me. Not sure if there is a key available for the latest version, but version 7.81 works fine with Windows 7. I used to like Flashget, but no luck with Windows 7. I am not an expert, so will be interested to hear what they use.
i had serious performance problems with downthemall, so I recommend Flashget, the classic old version v1.73 which has no torrent support etc.
Used to use FlashGet with FlashGot plugin for a very long time. Couple of years ago i switched to DownloadHelper (media stuff) and DownThemAll (all other stuff). Never looked back.
i tried FDM (free download manager) recently and it seems quite good, has a lot of support for other stuff like torrents, video, site explorer, ftp its seems a bit like flashget, only its free
I just tried Flash get 3 and it didn't work with the ISO I was trying to download from MS with the new Windows Home Server beta however the internet download manager did.... I agree its better....
Internet Download Manager. I like that when you watch Youtube videos a "Download Video" button appears on top off them.