The vast bulk of these papers came from the papers-we-love repository, they hold meetups which are excellent. Head over there to see if there is one in your area.
Papers in the worrydream directory come from Bret Victor's excellent references page.
I'm going over them, reading and adding notes as well as adding interesting papers I find.
Feel free to share and add comments / push changes.
The same papers are hosted on my own references page.