There are a number of places you can get free backlinks from. Here are some of my favorites!!
Enjoy a free trial of SEO Link Robot. With SEO Link Robot you can create and submit to Web2.0 properties and social bookmark sites at the click of a button. Interlink sites building open or closed link wheels. Index your content at the touch of a button. Ping sites, submit feeds and much more.
Article Marketing Robot
Article Marketing Robot is an automated article submission service. It automatically creates and confirms accounts for you on hundreds of different article directories. Article Marketing Robot offers a full five day trial. During this period you can get as many backlinks as you want.