Find DHCP server (ipconfig getpacket en0)

http://www.macosxhints.com/article.php?story=20060124152826491

ipconfig is *not* ifconfig…

Add user from CLI (man dscl)

http://osxdaily.com/2007/10/29/how-to-add-a-user-from-the-os-x-command-line-works-with-leopard/

Spoof Mac address

http://osxdaily.com/2008/01/17/how-to-spoof-your-mac-address-in-mac-os-x/

Customize login screen

http://osxdaily.com/2007/02/22/customize-the-mac-os-x-login-screen/

Wireless Networks tools

istumble http://www.istumbler.net/

ap grapher http://www.chimoosoft.com/products/apgrapher/

software update

change the server for update

set software update server : http://www.macupdate.com/info.php/id/24285

(or look for the plist)

Send Unix command:

softwareupdate -i -a

Certification

Apple official website

OS X

Cool Apps

Growl

Saft

Omnigraffle stencils

istats

Key Codes App

Full Key Codes

Yukelele

iCal, Google Cal, iPhone

Google Cal sync via CalDav

Google doc

For multiple calendars the trick is to get the id of the google cal. Google geeks have released Calaboration

Free iphone “pushing” via google-nuevasync/exchange server

All sync cals will be shown as one (one colour) in the iPhone  I can now see all my different calendar separated in my iPhone with different colors.