[cbr]

colordiff looks like: http://www.colordiff.org/screen2.jpg

It's just coloring the standard diff output so lines starting with > or + are yellow and ones starting with < or - are green. This is also what "git diff" does by default: http://www.jefftk.com/git-diff-color-2x.png

icdiff is doing a side-by-side diff, and it's only coloring the changed sections of lines: http://www.jefftk.com/icdiff-side-by-side-2x.png

[mitchty]

Not all that different than what you can achieve with git diff --color-words

Example: http://i.imgur.com/smubTnH.png

[cbr]

git diff --color-words is good. Here's what that looks like on the same file: http://www.jefftk.com/diff-color-words-2x.png