I have previously had the Snippet Compiler (Jeff Kay) installed, as I did not all the time want to launch Visual Studio.
I stopped using the snippy-thing as it at this time was not very good in presenting intellisense.
The story seems to have changed as the newest version of Snippet Compiler! It really seems to have picked up on a number of things - and seems far more appealing to use. I for one will give it another chance...
Link: snippet compiler homepage.