Multiple calendars (ICS) with view options

Greetings,

I’ve been on the hunt for a plugin that will support multiple calendars (ICS or CalDav) and enable visitors to choose which to display on the same “big” calendar.

For example, I’ve got 7 total calendars (different departments, different events, different maintainers). I’d like to allow visitors to check boxes of the calendars they wish to display on a single large calendar, preferably color coded or something.

This plugin comes close.

If anyone has any ideas on this or is aware of a plugin that does this “out of the box,” I’d greatly appreciate it.

Forgive me if this is widely known.