Meld is a visual diff tool. I’d say it’s one of the most useful applications I have ever used. You can compare two or three text files or directories at the same time or work with CVS and SVN directories and files. It displays the differences in a very handy and visually attractive way. Supports tabs and inline editing of text files and of course patch file creation. What else would one want from a visual diff tool!

You should check the screenshots at the project page. An rpm package exists in Fedora Extras. Just do a:

# yum install meld

Meld… by George Notaras is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
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About George Notaras

George Notaras is the editor of the G-Loaded Journal, a technical blog about Free and Open-Source Software. George, among other things, is an enthusiast self-taught GNU/Linux system administrator. He has created this web site to share the IT knowledge and experience he has gained over the years with other people. George primarily uses CentOS and Fedora. He has also developed some open-source software projects in his spare time.