Equity from the home you already own.  Sell the home and use proceeds to move into next home.  Or take out a second, rent the original home and use the equity to leverage your new home.

Home Equity Loan-Family members may have a considerable amount of equity built up in their own home that they were planning to borrow against in order to gift money to you.  At some point in time it is beneficial for parents to start "gifting" to their children, as a form of tax advantage.

Life Insurance-If you have a cash value policy, it may have matured enough to provide additional funds to your down payment.

Stocks and bonds-You can either sell the stocks and bonds or use them as collateral on a loan for down payment.

Company Profit Sharing or Saving Plan-Check with your employer to see about the possibility of withdrawing or borrowing from this account.

Retirement Savings Plan (401k) - If your employer offers this type of plan, inquire about the possibility of withdrawing or borrowing from this account.