Requests for Comment/Global on-wiki chat software

= Reason for Request = As some of you may or may not be aware, we use IRC at the current moment for communications, and whilst it's not a bad thing to have; it's scarcely used and generally isn't the most user-friendly protocol. Now, with that being said, IRC is still fine for support emergencies, but what about if a user wants to have an onwiki feature for chat? Yes, I know this either requires a boatload of money, or time coding something worthwhile as an extension, and whilst I realise this is not Wikia; I do also like to note that this is a good feature that they have, even though it is probably used more than the actual Wikia sites themselves, but it'll generally attract more users in the long run. Here's what I've laid out as possible options:


 * ArrowChat, which has a boatload of features, but it's rather expensive for Enterprise, the only version that allows multiple installations: https://www.arrowchat.com/features/all/


 * PHP Free Chat, a completely free and somewhat IRC like chat software developed in PHP, which looks to be highly customizable with MediaWiki integration (but both ArrowChat and this do): http://www.phpfreechat.net/opensource-version


 * The MediaWiki actively maintained chat extension: https://www.mediawiki.org/wiki/Extension:MediaWikiChat


 * The last option I see as a viable one is to create our own version of chat software and maybe base it off of the MediaWiki:Chat extension above.

Whilst obviously ArrowChat is too expensive, I just wanted to put it out there for people to see. The voting can begin below: