When crafting for charity it is often hard to find projects that are simple enough to complete quickly and pretty enough so you feel comfortable giving them away. Here are a couple of websites that have wonderful, easy patterns that turn out beautiful.
Project Linus is a non-profit organization that provides love, warmth, security and comfort to children who are seriously ill, traumatized or in need through gifts of handmade blankets and afghans. They also provide a rewarding and fun opportunity for individuals and groups to help these children. You can check to see if there is a branch in your area.
The Kansas City branch of Project Linus has some wonderful knit, crochet and quilted blanket patterns available for you to use.
Bev's Country Cottage has dozens of free patterns for preemie babies all the way to seniors. She lists some of her own patterns as well as tons of links to other free patterns on the internet. You can find any kind of pattern you are looking for on her website. She does such an awesome job. I use her resource a lot when looking for something new to make.
Knit and Crochet Hats ... Most people I know who knit for charity like to knit hats since they work up quickly. I found this chart for knit hats on the internet that shows different weights of yarn, different sizes of hats and the pattern to make them in an easy to read chart format. I use it all the time. There is even chart for those who crochet.
Baby Sizes ... I really enjoy making preemie baby items. Mostly because they are small and there are many charities that distribute them to hospitals. Here is a size chart based on the number of weeks gestation, how large a preemie is. I use this if I want to adjust a newborn size item to fit a specific sized preemie.