Loans and gifts can help with your down payment, but you can not use this strategy for all loan programs. The most popular program for this tactic is the Federal Housing Administration or FHA. FHA allows 100% gift funds for your down payment. The gift can be from any relative or can be collected through new innovative programs, like the Bridal Registry where couples receive money into an account that can be used for the down payment.
Another popular tactic, which can be used in a wider range of programs, is to borrow from your 401K program. If you have a 401K program with your employer, you can withdraw without a penalty for your down payment and pay it back over a specified period. It is often a smart move if this is your only option.