Windows: Ever since ourTunes stopped working after iTunes 7, many iTunes users have been looking for ways to easily download music from shared libraries over the network. AIR app Aethyr fills that gap, once again eliminating the need for an external drive.
Aethyr is pretty simple to use: just open it up and check the dropdown box in the upper right hand corner for shared libraries on your network. After picking a shared library, you can download any songs from it straight to your computer. By default, they'll go into a folder called "Aethyr" in your Documents, but you can change the folder by hitting the home icon in Aethyr's window. A good idea would be to change the folder to iTunes' "Automatically Add to iTunes" folder, if you want the songs to go directly into your iTunes library.
There are certainly a few small quirks with the software — for example, you can't listen to music while downloading songs — but it does more than a good enough job of replacing the functionality we all miss from ourTunes. It's also still being actively developed, and those quirks are still being worked on. The one thing we'd love to see in the future is a Mac version. Right now, you can download songs from Mac libraries, but Mac users can't use Aethyr to download songs themselves.
Aethyr is a free download for Windows only.