I’m loving Invoice Ninja! (self hosted)
The only thing i’m missing is to be able to group or categorize products.
When you have many products it can get disorganized.
Maybe an idea for a future update ? 
Thanks for the suggestion, feel free to create an issue on our GitHub repo. The more details the better…
Yes, sounds like it. Where can I find “Point of Sale Systems”?
I think it’s just the name of their product group.
I think finally this solution was not what I was looking for.
If you look at the expenses, you can assign each expense to a custom Expense category.
It would be great if the products section works the same.
Feel free to create an issue on our GitHub repo to track the request