indieopensource.com Open Development Time Block Terms
an open form contract for blocks of open software development time
Download the most recent release from GitHub, or read the current development version of the terms in Markdown format.
Contracts are prescription-strength legal devices. If you need terms for a deal, don't be a doofus. Hire a lawyer. A good one will ask good questions. They may decide this form fits your needs.
Do not put confidential information about you, your work, or your clients in issues or pull requests. Do not ask for legal advice on GitHub, or try to disguise requests for legal advice as general questions or hypotheticals. You don't want advice from anybody dumb enough to fall for that.