For various reasons Enterprise Linux separated some of their open source packages into separate packages. They still have released the source for these packages. We have incorporated these packages into the main Scientific Linux release.
There have also been various packages added with each Update. These naturally have been added into the main Scientific Linux release as well.

Clustering

clumanager
ipvsadm
piranha
redhat-config-cluster

Development

eclipse

GFS

The Global File System (GFS) cluster file system and related products.
GFS
GFS-devel
GFS-modules
GFS-modules-hugemem
GFS-modules-smp

"not supported" rpm's

In previous S.L. releases, there were extra rpm's generated from the source, that was not included in a normal Enterprise release. The vendor finolly decided to include these rpm's in their main release, although they still classify them as not supported.
We have thus merged our not supported repository into our main S.L. tree.
For the list of rpm's that this affects, you can look at the not supported area of S.L. 3.0.2 at
ftp://ftp.scientificlinux.org/linux/scientific/302/i386/notsupported/RPMS/

Update 1

elfutils-libelf-devel
jaf
javamail
junit
mtx
mysql-server
rh-postgresql
rh-postgresql-server
rh-postgresql-test

Update 2

net-snmp-perl
imap-utils
java-javadoc
jpackage-utils
laus
laus-devel
laus-libs
pam_passwdqc
php-devel
rhgb
sg3

Update 3

anacron
amtu
authd
bind-libs
bootparamd
diskdumputils
eal3-certification
eal3-certification-doc
evolution-connector
gsl
gsl-devel
gtkglarea
Gtk-Perl
joe
libglade
libglade-devel
lynx
nasm
nss_db
openoffice.org-style-gnome
perl-PDL
rpm-libs
skkdic
up2date-update

Update 5

jfbterm
cscope

Update 6 & 7

OpenIPMI
emacs-nox

Update 8

bitstream-vera-fonts