dl -- file exchange service using http and ACL ticket hashes
http://www.thregr.org/~wavexx/software/dl/
dl is a file exchange service that allows you to upload any file to
a web server and generate a unique ticket for others to download. The
ticket is automatically expired according to the specified rules, so that
you don't need to keep track or cleanup afterward. dl also allows you
to grant an anonymous, one-time upload for others to send you a file,
without the requirement of account management. dl is usually installed
as a "email attachments replacement" due to its simplicity (though can
be used in other ways).