Tóm tắt: dùng MIT, BSD hay Apache đều được, chọn MIT hay BSD cho đỡ nhức đầu về các khoản liên quan đến patent (đỡ chi phí pháp luật). MIT, Apache and BSD Compared License Code Use, Modification & Distribution
Phacility Individual Contributor License Agreement
Contributor License Agreement that Phacility requires every contributor to sign, before they can contribute code to the Apache license software Phabricator (so that some years later, they are allowed to change the license type without asking for permissions of original