$fetch URL
This ancient command (it appeared first in FreeBSD 2.1.5) retrieves files from URLs. It is simple and efficient. All its features are encapsulated in the libfetch library which can be accesed from a C program using a predefined API (man 3 fetch).
Example:
$fetch ftp://ftp.freebsd.org/pub/FreeBSD/releases/amd64/ISO-IMAGES/7.1/7.1-RELEASE-amd64-bootonly.iso
Why use this instead of ‘wget’ or ‘curl’ ?
Because fetch is in the base install, and you would have to install wget or curl from ports.
You don’t have to. But this command is included in the base system. This means it is present in every FreeBSD installation. It is also interesting to know that this is used by portsnap to retrieve the source code.