I have listed all the sites below. Keep in mind many of the sites are by invitation only, thus you will need to click on the links below in order to sign up and receive the credit.
If a site offers a one time credit to new customers I have listed the amount of that credit next to the site's name and link. If there is not a credit offered, then it will be blank.
I am a HUGE fan and advocate of these types of sites. They offer amazing and deep discounts on quality products, we are not talking cheap things or services. Businesses join up with these daily deal sites to provide these huge discounts, and it is a win/win situation. Business are able to sell more of their products/services, while you are able to walk away with a fraction of what it would originally retail for.
These deals make great gifts for all special occasions, or just a nice splurge for yourself at a fraction of the cost. Most are discounted at least up to 50%, and many more of the deals are well up to 90% off.
One Kings Lane - Receive a one time $15 credit for new members
HauteLook - Recieve a one time $10 credit for new members
Ru La La -Receive a one time $10 credit for new members
LivingSocial
Groupon
EverSave - Receive a one time $5 credit for new members
Tippr- Receive a one time $5 credit for new members
PlumDistrict
Modnique - Recieve a one time $5 credit for new members
Zulily - Daily deals for moms, babies, and kids
The Foundry