Perhaps the only parklet outside of a private citizen's house, the Deepistan National Parklet is outside of Deep (Amandeep Jawa)'s house on Valenica between 20th and Liberty. The parklet was established in June of 2011.
According to a plaque, the parklet is dedicated to the San Francisco League of Conservation Voters, the San Francisco Bicycle Coalition, Livable City, Walk SF, and all of the organizations making SF a better place.