I just want to mention CabinJS. It took me all of 10 minutes to set it up, and another 10 to get the automatic deployment to Github Pages working. The other 4 hours this sunday I spent on layouting, designing and tweaking the blog you're reading now.
And that's pretty sweet.
There's quite a few static site generators on the market today, of which Jekyll probably is the most famous, but CabinJS elevates a minimalistic setup combined with Grunt tasks to a new level of awesomeness. You can focus on writing your posts, instead of configuring your generator.
If you're looking for a blog generator that uses Grunt for:
.. make sure to CabinJS a try.