Here a list that i found (Godaddy promo code). A Domain promo code for new register or renewals in godaddy.com. If you found that the code were invalid, please let me know.

GoDaddy Promo Code (godaddy.com)

Price : $7.49 .com domain registration (not for Renewals). Better then other codes at registrations
Code : cjc749chp

Price : $7.49 .com domain registrations
Code : cjc749dom

Price : $7.49 for .Net .Org .Biz
Code : cjctld749

Price : Save 20% on hosting plans
Code : cjcchp20

Price : Save more than 50% on Ssl certificates /12.99$ ssl certification
Code : cjcssl12t2

Price : Save $1 on your order
Code : cjconeoff

Price : Save 10% off your order -No minumum-May work for Renewals also-
Code : cjcchp10

Price : 8$ .Com renewals with this code –Good–,registrations are 8.39$ , look top of page for 7.49$ .Com Registration.
Code : gda3112a

Price : Register a new .CO and save over 15%!
Code : gda3113a

Price : 7.49$ .com domain registrations
Code : cjc749t2

Price : 7.49$ for .org Registration
Code : goaorg01a

Price : .Asia domains for 9.99$
Code : cjcASIA310

Still need another Godaddy Promo Code????