You can instantly check the spelling or grammar of anything you write in Safari, Mail, TextEdit, or any Application which has a space to write text.
You can simply type the text out as you like, and then highlight the word or set of words and right-click, or type Control + left-click to bring up a window with a selection that says "Spelling and Grammar", then clicking the sub-selection "Show Spelling and Grammar" will bring up a window (without loading any external Applications) with possible corrections, if any need be, for your text.
You can also check the spelling and grammar of an entire document without having to select text by typing "Command + Shift + ;".
Want to have an easy way of backing up your notes from your iPhone 2.0 or 2.2.1 or any firmware prior to 3.0? Unfortunately, iTunes does not allow you to backup any of your notes you have saved to your iPhone unless you upgrade to the new 3.0 firmware. If you do not want to upgrade your firmware, but still want to have your notes saved, rather than transcribing potentially many many sticky notes, you can use this simple application instead.
It's a little app called iPhoneNotes. All you have to do is download the file, launch the installer, copy the application to your Applications folder. Now whenever you want to backup your notes from your iPhone, just launch the application first, and then connect your iPhone via USB and the iPhoneNotes will instantly recognize all of your notes.
The application will allow you to choose where you want to save your note files. You can also restore previously saved notes and put them back on your iPhone.
*Note, this application requires OpenSSH installed on a jailbroken iPhone.
You can remove the plus sign button for adding bookmarks, or remove the forward and backward buttons for page navigation. The layout in Safari is very flexible this way, you can even add buttons you perhaps were not aware of before, like a Downloads button or an Autofill button.
All you have to do is go to the View menu, and select "Customize Toolbar...". From there you can select and then drag and drop what you want or what you would like to remove from the Safari button layout.