1.4.0 is not from the dev branch, it's stable!
Although 1.4.0 is listed in the dev branch (and 1.2.2 still in the stable branch) here on freshmeat, it is stable, at least according to the announcement on Usenet (Message-ID: firstname.lastname@example.org, or see Deja.com message: "v1.4.0 of the slang programmer's library released" (http://www.deja.com/[LBURL=_LBHTfreshmeat.net_LBFS,LBT=freshmeat.net]/threadmsg_ct.xp?AN=570512095)) . I admit, I couldn't find that declaration in the source package. ;-)
(Hey, does add-comment.php3 also clobber your MSG-ID brackets?)
An open, cross-platform journaling program.
A scientific plotting package.