Found a couple on github:
I've never used any of them.
@waglo Yes, especially older scientific data is often on FTP servers and we link from homepages to such FTP servers for people who want the data.
Even if in the end you use FTP to download all the data, it is useful when these links are not broken and people can get a peek.
Newer data is on real data repositories, but not too long ago FTP was the standard.