[Rd] Front ends handling help.search() results?

[Duncan Murdoch]

Which front ends process the help.search() results to produce nice 
clickable lists, instead of the simple text display that's the default?  
I know the R.app gui on  Mac OS does; are there others?

I'm asking because one of the decisions made when R Core met in Vienna 
was to allow vignettes to be returned as results of help.search().  All 
of those front ends will need to be able to handle this.

Duncan Murdoch