Recent stable version of SQL Developer in portage tree is =dev-db/sqldeveloper-3.2.20.09.87. It was released almost three years old: Oracle SQL Developer 3.2.2 (3.2.20.09.87) November 1, 2012 I think, it's a time to stabilize something newer. For example — =dev-db/sqldeveloper-4.0.2.15.21 (I use =dev-db/sqldeveloper-4.0.3.16.84 more than 9 months and find it well enough, but it wasn't commited in gentoo repository, see bug #525244), it's just about one year old: Oracle SQL Developer 4.0.2 (4.0.2.15.21) May 5, 2014
amd64 stable
x86 stable. Closing.