I'm looking for a (preferably free) PHP+ MySQL based invoicing script to use for a tool rental business.
I basically want to rent out book and give the client an invoice.
A client comes and wants to rent a tool (for example), from Monday to Wednesday, so we need to book out the tool from that time period. Some tools are limited and only have 1 copy per storeroom. So I need to show tool availability online.
Payment gateway integration isn't a must, but it could be nice to add a credit card gateway via some API, or something. But it's rather important to be able to give the client an invoice and also show which tool was lent out and for which period.