CompuSense’s SpellBound ($249) is an XTension for QuarkXPress 4/5/6/7 that adds enormous power to XPress’ built-in spell checking.
You can open up to five auxiliary dictionaries at the same time, use non-alphabetic characters in entries, use ligatures, and create an exception dictionary to specify the preferred alternative between two or more correctly spelled versions of the same word (color vs. colour).
It also lets QuarkXPress ignore correctly-spelled possessives, and much more.
Read all about it, and see some nice screen shots at X-Ray Magazine.
Jay Nelson is the editorial director of PlanetQuark.com, and the editor and publisher of Design Tools Monthly. He’s also the author of the QuarkXPress 8 and QuarkXPress 7 training titles at Lynda.com, as well as the training videos Quark includes in the box with QuarkXPress 7 . In addition, Jay writes regularly for Macworld and Photoshop User magazines and speaks at industry events.