Super Saiyan
Super Saiyan is basically the powered up version of a Saiyan. When the Saiyan reaches this stage he gets a new "look"... the hair will turn Yellow and the eyes will turn green. The legend of the Super Saiyan says that a new Super Saiyan will appear every 10,000 years... which in DBZ did not happen... there were a ton and there was not 10,000 years between them. There are four Stages to a Super Saiyan... The other stages are SS2, SS3, SS4... in each transformation into a new stage they get stronger and a little cooler looking... except some argue that SS4 is not a Super Saiyan Stage.

Oozaru
Oozaru is a preaty cool form because The Saiyan turns into a giant monkey. This happens when a Saiyan with a tail looks at a full moon or an energy level that is similar to it... infact they create a energy blast to mimic the moon. When they Saiyan is Transformed into this form their powerlevel grows... 10 times there normal to be exact. So over all this is a usefull form.

Goldon Oozaru Goldon Oozaru is the most powerful form a Saiyan can reach. This level was only achieved by Goku and Bebi Vegeta. Goldon Oozaru is just like Oozaru form just even more powerful and instead of growing brown fur like a normal giant monkey... They Saiyan Grows Yellow Fur making it Goldon hince Goldon Oozaru