We are grateful to the Vilna Shul in Boston and their Ḥavurah on the Hill program for preparing “Siddur on the Hill,” (2011) a beautiful siddur for Shabbat Friday night services and sharing it with free-culture compatible, open content licensing. The siddur includes original translations in English from Rabbi Sam Seicol, interpretive writings by Rabbi Rami Shapiro, and illustrations by Georgi Vogel Rosen, as well as contributions from numerous others. Thank you for sharing your siddur, open source! . . .