As you know, there is Sanbon Kumite Jodan and Chudan too. Although it is called Maegeri, it represents Gedan.
In Suzuki Sensei's WIKF, 6 forms are practised. Ishikawa Sensei's performance is slightly different and he did 10 different forms.
On this page, you'll get the chance to read the full detailed explanation as layed out in Wado No Michi. The other 9 Kumite are listed below where you can jump right away to the pages where they are listed.