There is a 24-hour sale right now on TextExpander, which is one of the Mac OS X utilities that I rely on and use on a daily basis. TextExpander lives in the background and listens for abbreviations, which can be expanded out into frequently-used strings and images. For example, if I type "addresssf", it auto-expands into my mailing address. TextExpander works in most Mac OS applications.
The sale is via MacUpdate Promo, and **expires in 22 hours (which would be 9PM PST, Feb 23, 2011)**.
If you take advantage of the discount, **please check to make sure that the app you are buying is TextExpander**. One of my friends bought the wrong app last time because he forgot to check to see what he was actually buying!