UML free drawing programs for Mac

Some of my colleagues developers use these programs for UML drawing:

First of all, try this UML drawing application ONLINE:
http://www.diagram.ly/

DIA http://projects.gnome.org/dia/
ArgoUML http://argouml.tigris.org/ (the most popular, but some say it is for a geeks)
MagicDraw https://www.magicdraw.com/ (those who think ArgoUML is for a geeks wants try this one)

Just use ArgoUML, that's it ))

Where is Apache's httpd.conf on Mac OSX Lion

The file httpd.conf on Mac OSX Lion is located here:

/etc/apache2/httpd.conf

How to know the apache user by Terminal command

This commando will list the current apache user name:

ps aux | grep apache