The pumpkin hat is from the pattern on the KnittingAbout site, but I used some leftovers of poor quality acrylic.
The Spider and web use the same yarn, same shape as pumpkin hat, with vertical purl columns. I crochet chained black lines on the columns and then between for the web. The spider is a couple of rings of crochet sts with yarn ends threaded through for the legs.
The candy corn hat used the same yarns, but different shaping for the top. I have no idea just what I did!