Add the following to an .htaccess file, and all .php files under the .htaccess file will not be available via the web:
<FilesMatch "\.php$">
Order deny,allow
Deny from all
</FilesMatch>

The files will be available through PHP though. As PHP is not requesting the files through Apache webserver, rather is it requesting include files via the file system.

DropCopy is a insanely easy way to share files over your local network. Thanks to bonjour and it’s simple configuration, it is the perfect program for quickly sending files to other users on your local network.

There is a iPhone version too, Mobile DropCopy. There is a lite version, and the full version (which is $4.99).

If you’re in a Apple-centric LAN it’s perfect. Unfortunately there are only OSX and iPhone versions.

webcal links (eg. webcal://www.domain.com/calendar.ics)will only work in Internet Explorer if Outlook 2007 is installed on the users machine. Office 2003 or earlier do not install the support required to make webcal links active.

Sikuli is an automating script builder gui system. So it automates tasks.

It has a lot of potential and could become very user friendly if it was combined with automator.

http://127.0.0.1:631
CUPS (Common Unix Printing System), is running by default on OSX systems as the print server. The web interface allows you to easily administer the CUPS server. You can even have it send an RSS feed to a printer when your computer starts.