I do a lot of code dealing with DOM, that must be compatible with older versions of IE. I wrote this little library. It helps me a lot and I don't really need anything else to deal with events.
https://github.com/fczbkk/event-bridge
I also often need to react when some elements resize, disappear, move, etc. There are no native events for that. So I wrote Element Monitor that helps me to deal with it: