This should be added to the Community Manual and the API documentation. Also, guidelines for extension xtypes should be written up so extension authors don't override each other.
Thanks for the list!
Just to point out the obvious -- the API docs are actively maintained (unlike a random forum thread)... I would suggest anyone looking for this info in the future check the API docs for the most current info.
The purpose of this thread was to help those who don't know where to find the xtypes for each component.
Not all the newbies are familiar with the API Documentation (but I'm sure they are with this forum!), and could be very frustrated not to find this list quickly.
I have removed the list and just point to the original DOC.