A very bloated editor. It can do just about anything. Some people do almost all of their work in emacs every day. Others think those people are completely looney. You know it, you love it, you use it.
Many people find it extremely useful in creating logos and other graphics for web pages.
The GIMP has many of the tools and filters you would expect to find in similar commercial offerings, you would expect to find in similar commercial offerings, and some interesting extras as well. GNU tar allows you to store many files in a single tar file which describes the names and contents of the constituent files. You can later extract some or all of these files from the archive. ImageMagick ImageMagick is a collection of image utilities for display and interactive manipulation of images for the X Window System. The ImageMagick image display program can display an image on any workstation screen running an X server.