Every time I post an article, I create a thumbnail to go along with it. Often this part is the most tedious. I usually do it in Photoshop or another image editor. To try and make this easier, I've recently automated the generation of post thumbnails of this image with Javascript and Node.JS. In this tutorial we'll be looking at how you can generate your own article images automatically, using Node.JS and Canvas. The final code can be found in this Git Gist.
Here is an example of an image I generated using this method: