This website isn’t about giving per se, but it is interesting. www.globalrichlist.com allows you to rank your income compared to the rest of the world. It is sobering to think that if you make $25,000 annually, you are richer than 90% of the people in the world. At $50,000 per year, you are in the top 1%.
Of course, this doesn’t factor in cost-of-living, but this site is a great way to visualize the fact that three billion people live on less than $2 per day while 1.3 billion get by on less than $1 per day. Seventy percent of those living on less than $1 per day are women.