Irssi
Themes
https://github.com/ronilaukkarinen/weed
/set theme solarizedweed
/save
irssi-git
I can't recall the state, I think there was a problem with the autoloading of the XMPP plugin. Therefore I reverted back to packaged irssi. Will try again once migrated to bitlbee.
OTR
https://github.com/cryptodotis/irssi-otr
https://wiki.archlinux.org/index.php/Irssi/irssi-otr
XMPP
https://github.com/cdidier/irssi-xmpp/blob/master/docs/GENERAL https://github.com/cdidier/irssi-xmpp/tree/master/docs
Compared to bitlbee, irssi-xmpp is less maintained and buggy.
Twirrsi
Twitter client for irssi