What are some alternatives?
When comparing WebCopy and aria2, you can also consider the following products
HTTrack - HTTrack is a free (GPL, libre/free software) and easy-to-use offline browser utility.
JDownloader - JDownloader is a free downloading tool that enables you to download files from over a hundred hosting sites. The tool is compatible with Linux, Mac and Windows operating systems. Read more about JDownloader.
Wget - GNU Wget is a free software package for retrieving files using HTTP(S) and FTP, the most...
Free Download Manager - It is a powerful modern download accelerator and organizer for Windows and Mac.
Offline Explorer - MetaProducts Offline Explorer is a Windows NT/2000/XP/2003/Vista program that allows you to...
qBittorrent - Lightweight and open source torrent client that runs on all major platforms.