In the 00s, we had multi-IM clients like Trillian, Gaim&#x2F;Pidgin&#x2F;libpurple, Kopete, Telepathy, etc.<p>Now, there&#x27;s so little work done in reverse-engineering IM protocols. It&#x27;s really sad. Part of this is because Sean Egan got hired by Google to work on Hangouts, so he&#x27;s out of the reverse-engineering game for good, and it&#x27;s sad that nobody took up the mantle from him.