Thanks for the compliments, ladies! The ruler is called Simpli-EZ 30 degree Triangle. I found mine at Tuesday Morning; it was actually a package of 3 of the rulers for $7. I shared the other two with quilty friends! It makes the Tippee Canoe block; Darlene Zimmerman made the "Hummingbird Quilt Pattern" (AWESOME!-google images to see some quilts) with the ruler and has a tutorial on her websight (straythreads.blogspot.com).