The following are recommend resources for various template structures to use (with appropriate counsel) in seed rounds. As counsel to startup companies, we use these as starting points for simplifying negotiation.
Additional Reading: A Convertible Note Template for Seed Rounds
Seed Equity (simplified Series Seed)
Additional Reading: Myths and Lies about Seed Equity
NVCA Equity (full Series A-style docs)
Additional Reading: Startup Term Sheets