What are of these arts?

[Katsuya]

I just started kendo and of hearing about satsujin jitsu, battojutsu, kenjitsu, ninjitsu, and many others. I am confused with these terms.
your help will be greatly appreciated.

[Neil Gendzwill]

I just started kendo and of hearing about satsujin jitsu, battojutsu, kenjitsu, ninjitsu, and many others. I am confused with these terms.
your help will be greatly appreciated.

None of those are kendo terms, you don't need to know them for your kendo practice. Here are some rough definitions:
satsujin jitsu - art of life-taking. I think this is the name for somebody's made-up martial art.
battojutsu - art of drawing the sword
kenjitsu - art of fighting with real swords - both battojutsu and kenjutsu are part of the curriculum of older schools of fighting (koryu)
ninjitsu - art of stealth - there are many schools teaching fake versions of this all over the world, avoid them

[JimB]

Are there any other schools of Kendo or sword arts besides the different schools of Iaido? As a student of Japanese history I know there were several schools of sword drawing and fencing (perhaps the wrong word to use here) and I wondered if any of these survived the Meiji era to the moderen times and are still taught in Japan?

[Neil Gendzwill]

www.kendo-sask.com/swordfaq.htm
www.koryu.com

[Twobitmage]

and one might note that those you listed are broad categories

there are many styles and subcategories to kenjutsu and the like. Sort of like how people say "kung fu" but theres mantis kung fu, crane kung fu, tiger kung fu (you get the point).