22a2b88b_on_of_XMPP_Jabber_IRC_and_PSYC__0
[IRC] ircd: efficient, compact, legacy [XMPP (Jabber)] typically modular, multiple processes and SQL, funny language optional [PSYC] psyced: modular on the fly, likes decentralization, funny language [0] 
Server Software Structure
PSYC Comparison of XMPP Jabber IRC and PSYC
0