GtkGamma is a simple program that allows the user of an XFree86 station to easily alter his/her monitor's gamma correction. If a monitor's gamma curves haven't been tuned, colors half in the range from black to maximum tint (either red, green, blue, or white) tend to look different from a uniform pattern, formed by an equal number of black and maximum tinted pixels, although it should look exactly the same. GtkGamma provides a simple GUI that gives the user the feedback needed to correct these curves.
I think it's very annoying to see all of those Debian and Red Hat Updated package announces. Linux distributors should have their own lists to make such announcements, which only interest their users. If a user is wise enough to have found freshmeat.net, she should know how to find her system distributor's mailing list.
These should be filtered away, and I don't think anybody will get hurt.