Halt download

Hello together!
i would like downloading several linux distribution for trying them out and to know which i will install permanently...
so iso files are queit big...
does smartftp support to halt a download, i shutdown the pc, then i continue the download.
i remember a downoad tool of a friend of mine hed this feature.
what is about smartftp?

thanks

If You use global queue you can halt a download and resume another hour/day etc