This question has been answered by rethrash. See the first response.
It's actually EventsX. I am fairly certain we'll use a different solution when we simplify and streamline modx.com for 2013.
Maybe you could check this out http://rtfm.modx.com/display/ADDON/MIGXdb.Manage+Events-Resources+in+a+CMP+with+help+of+MIGXdb
Since you're thinking of not using it in future, can you tell me why and what you might be moving to?