Apps with 'Download Queue' feature

The qBittorrent project aims to provide a Free Software alternative to µTorrent. Additionally, qBittorrent runs and provides the same features on all major platforms (Linux, Mac OS X, Windows, OS/2, FreeBSD).

iGetter is a full featured download manager and accelerator. It resumes broken downloads and recovers from download errors. It is excellent utility for files that you want to download at ease.

Progressive Downloader is a free download manager for your Mac that supports multi-thread downloading and mirror search. It's also capable to download files from the most popular file hosting services.

Take control of your JDownloader queue! View progress of your downloads. Start or stop them as necessary. Add links to hosted files and they'll be waiting for you at home.

Simplistic and intuitive explorer-like ftp client. Open source.