Food gets tricky these days. You have to apply for some food wotchie; the Post Office has details. So, I've given up sending food.
One thing I've given are local calendars, not the ones available in the US...the ones of my area.
I've also brought magazines with me on trips back and they get gobbled up by everyone; they are almost like gold and I swear my sister-in-law is avoiding me because I gave my mother the magazines. My mother shares them with a neighbor who used to live in England, the next town over from us. (This magazine is particular to our area: Wiltshire Life, and it's got all the local stuff like people events and stores information and property for sale, but it's done very nicely, class.)
I've also given CDs done by local choirs, like Christmas music done by the choir in Salisbury Cathedral.