Custom post form? Is there something like a form plugin for this?

I’m designing a website for a snowmobile dealer and they just need a simple WP site but with an inventory of their snowmobiles.

For me to turn this over to them when I’m done I need a simple way for them to input snowmobiles as posts. I was hoping there was a plugin or something that would allow me to make a custom list.

Thanks in advance for any help!