Highlight sentences in Emacs with a custom face. Very nice.
Highlighting is based on the hl-sentence face which you can
customize to make the face look the way you want. I use this
primarily in LaTeX mode where I enable variable-pitch-mode. So I
customize my variable-pitch face foreground to be gray60 and then
make hl-sentence be black. Works nicely.
This was taken mostly from http://www.emacswiki.org/emacs/SentenceHighlight
I believe Aaron Hawley is responsible. I just took it and made it a single file and to properly enable and disable the minor-mode.