Best summary of patterns:https://newbornsinneed.org/patterns/bereavement-patterns/
Hats
http://www.bevscountrycottage.com/baby-hats-booties.html
Angel pockets:
Crochet-https://www.bevscountrycottage.com/fetal-pouch.html
Sew-https://www.bbc.co.uk/stoke/my_pages/babywear/sewing/003.shtml
Blankets
https://crochetcabanablog.wordpress.com/patterns/preemie-or-doll-afghans/
http://www.bevscountrycottage.com/janet-wolfe/1freebabyblanket.html