Wool dryer balls
My friend Megan introduced me to these, now I love using them for my laundry. Here's a link to a post about them by David Suzuki http://www.davidsuzuki.org/blogs/queen-of-green/2012/09/wool-dryer-balls-shrink-drying-time/ 
They help reduce static and drying time without the use of fabric softener. They do pill a bit in the dryer but if it bothers you, you can use a sweater shaver to remove the pills. I'm not too bothered as they're only going in the dryer.  I sell sets of three for $15.