Blocks and Patterns
Other Pattern Locations
Quilts of Valor Foundation Patterns
Log Cabin Triangles Tutorial (from the Colorful Fabriholic)
More to come...
Lots of fabric manufacturers offer free quilt patterns on their websites: Riley Blake, Free Spirit, Moda, Wilmington Prints, Timeless Treasures, and more.
Allpeoplequilt is another great place to look for quilt patterns.