This is 4 list of the top 40 free sites to get free backlinks. They are for different categories.

1. Top 40 for RSS Leverage

2. Top 40 Social Bookmarking Sites

3. Top 40 Press Release Sites

4. Top 40 Article Directory's

Code:
http://www.mediafire.com/file/w5ud3ipy4h7arcz/Top40.zip