Zhenyi Tan, who I linked to back in April about his app History Book (which I still use), is on a bit of a tear. Just take a look at Tan’s website post archive and count the number of times you see the word “Launch”.
His most recent projects; a Time Machine inspired UI ontop of the Wayback Machine, an expense tracker, a music player, and several clever Safari Extensions – have all been released in just the last few months.
His prolificacy reminds me of _DavidSmith.