After changing from Windows to Mac, at the first glance of Mac keyboard, I feel very shocked, really.. There are no Windows key, no Alt key, no Ctrl key. Instead of 
Mac New Key
I move and click my tiny little mouse wildly and fortunately open the browser finding some hints.
You also can customize some shortcuts.
It's the first time you come in touch with Mac. Don't worry, the more you know about Mac, the more you will fall in love with it.
Mac Spotlight
Another interesting thing in using Mac is feature called Spotlight. This come in handy when searching for something. Located at right-top corner of the screen or you can trigger it with 
Spc
Mac Writings
Don't worry anymore for specific language unicode. Mac support all that you need.
Look, I've that many.. And many more inside here..
Also, you can find a mountain of symbol inside Mac. Variations of symbols, from Math Symbol to Braille Patterns, you can access. And for some symbols, there are keyboard shortcut for it. Of course, only for Mac keyboard.
Mac Dashboard
Let's move on to other cool feature Dashboard. Pressing F12 will activate it (or click on the icon). Semi-transparent desktop background with lots of fun and useful widgets. And you can add or remove it anytime you want. Here are some widgets I have.
I often use Dictionary. With this, I don't need to browse around the web to find some particular word meaning. Dictionary's words definition is taken from Oxford American Dictionary. You can get a dictionary without pain in the pocket. What a benefit. And there are many other dictionary for other language.
With a simple click of mouse, you can flip around this simple and nice Calendar. With hand stay still, only moving and clicking the cute little mouse. Simplicity is the best. Also you can write down important thing to your Stickies. Easy to read, easy to write, and ease to erase. You can find one example inside the picture, above the clock. And also, you'll need no extra battery for setting up Clock around your working computer. Just activate the dashboard. And you can see the legs of your clock dancing around. No time consuming, no extra energy needed.
It's so unlucky to have to stay below a tree or inside a cove when it's raining and you forget to bring umbrella. With this widget, you will have up to 6-days Weather Forecast and will be updated automatically.
Want a delightful, lovely, and pleasant collection of colors. You will see that colors from this TangoPalette widget ,it including the RGB code of the colors. Marvelous!
Knowing underneath the underneath. That's what I feel at first glympse of this iStat Pro. Now you can manage to know processor usage, memory usage, disks usage, network connection, temperature, and even fan speed inside. Also provide wave of our processor and memory usage.
Those are some reviews of my favorite widgets. You can find more of those and have fun..
WidgetsMac Font Book
Mac also have an application called Font Book. You can store many kinds of font inside. Just drag your color style into that book. It will be added automatically.
Mac QuickSilver
QuickSilver is a very practical application . With this, opening apps is a piece of cake and save lots of time. You can customize the shortcut for apps in Mac (I make
Mac Instant Messaging
For Windows user, there are softwares to communicate with another user, like YahooMessenger! or MSN Messenger. For Mac user, like me, you have Adium. This instant messaging apps has lots of feature.
You can chat with lots of people with just one conversation field needed. Can switch from one to other conversation (
I am really grateful I use Mac. No regret. So, what are you waiting for, let's Mac.