MIT license with a donation message. I like your phrasing of "pay-if-you-want" more than "donate". The former anchors you to think about the fact that this cou

MIT license with a donation message. I like your phrasing of "pay-if-you-want" more than "donate". The former anchors you to think about the fact that this could have been paid software. ie: What would have been an acceptable price if you had to pay for this.