"For years, discerning Windows users have relied on Tweak UI, a
semi-official Microsoft program for system settings not available
on the default desktop. Now, in the same tradition and with
something of the same name, Ubuntu Tweak (UT) offers the same
advantage to Ubuntu users. Currently at version 0.2.4, for now UT
is limited to features for GNOME and focuses mainly on changing
default desktop and system behavior and how GNOME interacts with
your hardware, but this small feature set is more than enough for
proof of concept.
"UT runs on Ubuntu 7.10 and 7.04, and is available as either a
Debian package of 127KB or as source code. Since UT apparently
searches for the distribution and version, it does not run on
earlier versions, or--unlike many Ubuntu packages--on other
distributions that use Debian packages..."