There are many different resources available:

• Gain community support from the Ripple Forums 
• Find resources on the Ripple Developer Portal 
• Join the Ripple Labs Developer Mailing List by emailing Ryan Terribilini (ryan@ripple.com)
• Submit a pitch to CrossCoin Ventures for start-up funding

• Ripple Primer: an introduction to the protocol
• Gateway Whitepaper: an introduction to operating a Ripple Gateway
• Gateway Integration Manual
  • Manual Gateway Setup Guide
  • Video on Manual Gateway Setup
  • Automated Gateway Operation Guide

• dev.ripple.com: documentation on the REST API, which is the easiest way to integrate into Ripple
• Ripple URIs can be used to generate payment links