http://lainyubrp2aabmxhepbttfdbl53dct2inqifs42buvpf6w44uiitbeqd.onion/blog/matrix.html
I'd sit in jabber and tolerate all the flaws, but you know, there's no point in a IM server if no one will communicate with me :). Element X , the latest client from New Vector Ltd is so over-simplified that even grandma would have no problems with it.