These are all linked from our website, but just in case:

To learn more about ethereum:

https://www.ethereum.org/pdfs/EthereumWhitePaper.pdf

For development specifications:

https://www.ethereum.org/pdfs/Ethereum-Dev-Plan.pdf

Ethereum Roadmap:

https://www.ethereum.org/pdfs/Ethereum-Roadmap.pdf

To learn more about our plans:
https://www.ethereum.org/pdfs/IntendedUseOfRevenue.pdf

Terms of ether sale:

https://www.ethereum.org/pdfs/TermsAndConditionsOfTheEthereumGenesisSale.pdf

Ether Product Purchase Agreement:

https://www.ethereum.org/pdfs/EtherProductPurchaseAgreement.pdf