jabberd14 (formerly known as jabberd) is the original XMPP server daemon, first created by Jeremie Miller and the early jabber.org developer team. It is free software, originally dual-licensed under the JOSL and GPL and now licensed under GPL. jabberd2 was intended to be jabberd 1.4's successor but in 2006 the jabberd 1.4 project was still being developed.
jabberd14 v1.6.x used with the jadc2s client connection manager now fully supports the core XMPP specifications, RFC 3920 and RFC 3921.
The software allows individuals to be a part of the XMPP network of servers or to create their own separate instant messaging deployment.
Its popularity was initially high among XMPP servers, as for quite some time, jabberd was the only XMPP server software available. Jabberd's popularity has since waned considerably as other XMPP servers have since been released. Criticisms inspiring other XMPP implementations include jabberd's complex, XML-based configuration and scalability at large sites. Indeed, the Jabber.org IM service migrated to ejabberd after a period of extended downtime related to jabberd eating all server resources during peak hours ( https://stpeter.im/?p=1482 )