Skitch is my favorite clipping tool. I'm running it on my MacBook as well as my phone. There is nothing out there (that I have found) that is as convenient as this app to grab a screenshot. Use the annotation feature to share ideas or quickly explain an edit. As you know, a picture's worth a thousand words. Use this app when only a picture will do.

If you are looking for something free and easy-to-use, try it.  

Do you have other clipping tools that you rave about? Please share with us...