"One of the more widely embraced Open Source projects
to emerge over the past few years has been Jabber, an instant
messaging system initially conceived to overcome the limitations
competing IM giants placed on users in their quest to seal up as
much of their markets as possible.
Jabber, Inc. is a company that sells enhanced and customized IM
solutions built around the core Jabber product. It recently
announced the Jabber Everywhere program, whereby businesses and
small organizations could try out a limited but fully functional
version of its server software for no cost.
Our initial reaction to the offering was poor, and it was with
some relief that, just as we prepared to publish this overview, the
company released a second version of the package addressing a few
of the problems we experienced.
At its core, Jabber is a set of protocols built around XML that
describe how to allow instant messaging clients to communicate. The
reliance on XML is a distinctive feature of the Jabber protocol's,
and it fits well with other programming communities, such as Perl
programmers, who have built a robust set of tools that allow Perl
programs to interact with Jabber servers and clients."