If you include custom brands there are more than people could think of.
Some more brands:
*Dragon
*Homegrown (a type of sweets but different model
[1]*Ultra
*Sourmash (he's got his own kens too!) & the Stove
*Deal With It
*PAW (very little created but probably classed as a brand I guess)
*Trojka (from kendama.cz)
*CWCS
*Terra
*Folken
*Hajimeteno (red JKA seal)
*Grip
*Steeze
I agree there is a lot, but then again each company have there strengths, I like to see new company's emerge but then it can be a bit annoying if they don't live up to expectations. That's why I personally go for larger ones. As I know I won't be disappointed
-Rob