If they are on the github repos, yes. There is a license there (the MIT License) that is automatically accepted by anyone uploading to those repos. You can read that license here: <a href="https://github.com/Roll20/roll20-api-scripts/blob/master/LICENSE" rel="nofollow">https://github.com/Roll20/roll20-api-scripts/blob/master/LICENSE</a> For other code, it's better to ask, but it's safe to assume that anything posted to these forums or the roll20 wiki is open for use by anyone. It's a long standing tradition that it's okay to use whatever you want from other sheets, and you are explicitly encouraged to take what works for you.