This is a calendar that syncs between clients, in order for it to sync, you have to click the up arrow icon if it glows, that means someone needs your updated version of the calendar.
Set the chat prefix/number to the channel that you want to use for sharing/receiving data (recommend a user defined chat channel)
This is not complete, and I don't know when I will have the time to work on it, but it could be useful to someone
I have only been able to test it with 3 clients so far, so there may be a bug that I've missed, hoping not though.
The share event button has to be clicked on the left part. (think something is messed up with the stretch modes, will sort it out at some point :/)