Tired of using Ad-supported bloated download managers? Try TrueDownloader. Its a GPL’d Open Source Download Manager. You can download the VB/VC++ source code as well from the same site. I got rid of DAP (Download Accelerator Pro). Its supported by ads and very slow. TrueDownloader is way faster and better and simpler.
If you’re on BSD, not much choices out there. But there are plent of free Windows stuff. Or you can use warez :p
If I’m on FreeBSD, I’d be using wget most of the times
I guess there’s one good Download manager for Gnome, Cant recollect the name. But you have kget on KDE always.