If you experience an Mac OS X program to freeze and you cannot exit it by clicking quit or using a keyboard shortcut, you can always force it to quit using the Activity Monitor.
If you know how to sing or hum a song, but don't know the title or the artist performing it, you can use a midomi website which will help you find the the song.
An awesome tutorial suitable for Photoshop beginners and intermediates where we create a cool looking gas planet from scratch, by applying a couple of rendering functions and a few tricks.
If you use Google services such as Google Reader, Google Drive, YouTube, Contacts, Google+ Circles, Latitude, Picasa Web Albums and a few more, you can download all of your stuff to your computer.
If you are on a certain data plan on your mobile provider, and don't want to exceed it, you can set data usage warning and a limit which can help you save some of your money.
By default Windows calculator doesn't support order of operation, to enable the functionality you need to activate the scientific view, let me show you how.