Wordpress Read Time - Shows you the reading time of your blog post as you write
Janetter - Janetter is a Twitter client application. Faster, smarter, and more powerful.
How Long to Read - Find out how long will it take you to read that book
YoruFukurou - YoruFukurou (NightOwl) is a Twitter client for Mac OS X, designed for Twitter addicts.
The Read Time - Calculate read time, speech time, and word count of any piece of text all at once!
Talon for Twitter - Elegantly designed, ad-free Twitter experience for Android