Cooley Go is a great resource for legal agreements and forms commonly required by start ups (particularly venture backed startups). The site includes both the form templates and documentation generators. The site also includes a number of posts related to start up FAQs such as allocating initial founder equity, tax issues associated with equity incentives, etc.

For a deeper dive into the legal issues frequently encountered by venture backed start ups - check out the Entrepreneur's Guide to Business Law:

https://www.amazon.com/Entrepreneurs-Guide-Business-Law-eboo...