Pro Bono Service
Originally a term applied to established professions such as medicine, the law, accounting, etc., pro bono publico work meant, literally, "for the public good" -- and it was considered a duty of members of a profession to offer some part of their services at reduced fee or free to those in need. Today, the term "pro bono" is applied to any sort of volunteer service in which someone donates skills for which he or she would otherwise be paid. So if a Web designer creates a Web site for an organization at no charge, that's pro bono service. Pro bono is only used in the context of the work done by the volunteer. So if this same Web designer volunteers for something unrelated to how she or he earns a living (such as coaching youth soccer), it should not be called pro bono work.