Who's SaaS is giving back to charity?

The Salesforce 1-1-1 charity model. Salesforce.org

Moving this post to the new Social Entrepreneurship group. Regular (non-link) posts used to allow you to include a link, so this post now shows as a "link post" without a body. So I'm going to paste the body in this comment:

I often see companies with physical products include charitable giving in their marketing. Are there any notable SaaS companies out there who are doing similar?