Sign up for an account with Chaosium if you don't have one already and use the code "CHAOS GOODIES " at checkout to get these two PDF downloads for free:
Christmas in Kingsport contains "...Five (mini adventure -z.b.) tales certain to scare the stockings off the mantle."
and Arkham, Now : This is a PDF map depicting the city of Arkham, Massachusetts in the modern-day.
Update: Let me know if you have a download problem, I've tried with 2 different emails and accounts and haven't had a problem yet but YMMV. You might also try them at email@example.com.
Adventure-Building and The Ecology of Murder
10 hours ago