Trouble in Hochen features the familiar scenario of disparate individuals coming together to investigate strange happenings, but I can’t find a PDF version. (I thought it was available outside of the Adventure Burner, though).
Dinner for One and Your Day in Court, the second and third parts of the Verdorben trilogy after Trouble in Hochen, are both available for download on the wiki.
Both can make excellent standalone scenarios. Dinner for One is survival horror with a bit of mystery. Your Day in Court is political intrigue with the characters in way over their heads.