Graphical download manager for Linux (alternative to d4x)

I recently noticed that the “defacto” Linux graphical download manager, d4x, was not available in Debian 6/Squeeze repositories. After having a look at the d4x bug database it turned out that d4x was was removed because it was both no longer maintained upstream and it was determined to be non-free.

I went about looking for an alternative for d4x, and found three options: