CoolEdit is an edit enhancement add-in for Visual Studio 2005. It will automatically insert “//” or “*” like comments after you press enter in a line starts with “//” or “/*” or “*”. Below is some example for it:

//comments like this
//the "//" in this line is auto generated
somecodes .....
/*
* the "*" this line is auto generated
* the "*" and indent is also auto generated
*/

Its current version is 0.3, You can download it CoolEdit 0.3 :) Enjoy it!