Kaare Rasmussen told me about a new CPAN project led by Nadim Ibn Hamouda El Khemir called VIP:
The goal of the VIP project is to produce a first class Perl editor that
can be used as a component in a (yet to be developed) IDE. We will try
to write vip so it will build on the strong points of of Perl 5 and 6.
Our first step is to provide the editor itself. It will consist of the
core engine and have (at first) three interfaces; used from Perl itself,
a text based (curses) and a graphic (gtk) interface.
Apart from the usual features, such as syntax coloring and
templates/wizards, we plan to include innovative features, like support
for Pair Programming, and to make it extremely configurable and
pluggable (integration with Sprog (http://sprog.sourceforge.net/) will
be one way to extend Vip).
The project is currently in the initial phase and we expect to have a
working draft within the next couple of months.
We can always use help. To test it out, find bugs, propose features and
write documentation, plugins and code.
The project has a name on CPAN:
http://search.cpan.org/~nkh/Text-Editor-Vip-0.011/, a home page
(http://...) and a discussion forum (http://www.cpanforum.org/...).