The Download Slave is a very flexible script which is controlled via eMail and stores files requested for downloading on the server's harddisk or sends them via eMail to the user who asked for them. Users are identified by their eMail address and a personal password, so only authorized users can use the service.
Mutt Address Book is a script to manage your own address book with mutt's "External Query" functionality. It features searches in fullname, e- mail address, and even comments. So you can find any person you can remember the comment to, and do not need to remember names or even cryptic aliases. It also features adding people to your address book from within mutt directly. The From or Reply-To header fields are parsed for that purpose, so you don't even have to type in the fullname or e- mail address yourself. The only thing you might type if desired is a comment for this person.