What are some alternatives?
When comparing Blue Crab and DPLOY, you can also consider the following products
HTTrack - HTTrack is a free (GPL, libre/free software) and easy-to-use offline browser utility.
FileZilla - FileZilla is an FTP, or file transfer protocol, client. It lets individuals transfer single files or batches to a web server. For many years, FTP was the standard for website design. Read more about FileZilla.
FTPDrive - Download FTP Drive v3. 5. 214 Kb. FTP Drive - program, that allow working with FTP for those programs, that don't know what is FTP. Emulates logical drive, where selected FTP servers are mounted as folders.
WinSCP - WinSCP is an open source free SFTP client and FTP client for Windows.
WebCopy - Cyotek WebCopy is a free tool for copying full or partial websites locally onto your harddisk for offline viewing.
Cyberduck - A libre FTP, SFTP, WebDAV, S3, Backblaze B2, Azure & OpenStack Swift browser.