From the official site
"An alternative to GNU Emacs, XEmacs was originally based on an early alpha version of FSF's version 19, and has diverged quite a bit since then. XEmacs was known as Lucid Emacs through version 19.10. Almost all features of GNU Emacs are supported in XEmacs. The maintainers of XEmacs actively track changes to GNU Emacs while also working to add new features."
Please submit only sites and pages of general interest for XEmacs users to this category.
Modes and packages for XEmacs should be submitted to Emacs Lisp
with a note stating that they are for XEmacs only.