Psi+ is the development version of Psi, a client for the XMPP protocol. Written in C++ and based on the Qt library, it is extensible and implements handful XEPs like whiteboarding, MAM, OMEMO encryption and OTR messaging. It does not require KDE to run. WWW: http://psi-plus.com/
Among other features, it does support Wayland protocol through qt5-wayland (which net-im/psi does not)