Porunga

  This is the Dragon of Namek. When you make a wish with Porunga, the wishes must be spoke in the Namekian language. Porunga can grant 3 wishes. As with Shenron, there are 7 Dragon Balls and once the wishes are made the Dragon Balls scatter to the corners of the earth, but, instead of waiting a year you only have to wait a half year. You cannot wish for someone to be killed.

Shenron  

Although this Dragon can only grant one wish, he is used the most in Dragonball and Dragonball Z. After a wish has been made, the Dragonballs are scattered to the corners of the earth. Once someone collects them and a year has passed, you can once again make a wish with the dragon. The dragon was created by Kami, but, when Dende became guardian he re-made Shenron to be able to have more wishes, and for those wishes to be more powerful than before. You cannot wish for someone to be killed.

Naturon Shenron 

  After Vegeta killed a large number of innocent people, a wish on the Dragon Balls brought them all back to life. In this way, Naturon Shenron was born. Possessing the power of Earth, he delights in causing earthquakes and watching cities fall before his power. 

Dragon of the 7 star ball.

Oceanus Shenron

 The Dragon of Water and Wind, Oceanus Shenron, dons the persona of Princess Oto, who the residents of a small fishing village worship as a god. When asked which wish she was born from, Princess Oto becomes angry and embarrassed. 

Dragon of the 6 star ball. 

 Rage Shenron 

 Despite his small size, Rage Shenron carries a shocking power: electricity! He creates a slimy substance that draws the energy out of any object that it touches; the energy is then transferred to his body as strength. Rage Shenron was born when Goku wished himself back to life after Vegeta landed on planet Earth.

 Dragon of the 5 star ball. 

 Nuova Shenron 

 The Dragon of Fire, Nuova, was born when King Piccolo wished for youth when Goku was a child. With the power of the sun and of fire at his disposal, Nuova is more than a challenge for Goku. Things really get hot when Nuova's brother, Eis Shenron, joins in the fray! 

Dragon of the 4 star ball. 

 Eis Shenron

The Dragon of Ice, Eis Shenron, is Nova Shenron's brother. Eis Shenron joins the fight against Goku and even has him down and beaten. Just as the Dragon Balls have turned against their masters, Eis Shenron may find that turnabout is fair play. 

Dragon of the 3 star ball.