Lovely clear intro demo in this One Pager for 'ReadRemaining.js' - a free JS plugin that tells readers how much time is left to finish reading an article. What I love about this product is it adjusts the time based on your current scroll speed, smart. Great touch with the background clock illustration assembling as you scroll.
Tell your readers how long they'll need to get through all of your gibberish, with this clever jQuery plugin. With ReadRemaining.js TL;DR is a thing of the past.