Pos Counters Can Anyone Tell Me Where I Could Get POS Software For Free Or At Low Cost?

Can anyone tell me where I could get POS software for free or at low cost? - pos counters

I have 2 computers, Voyager 2, 9500 Series Scanners, 2 Epson U220 receipt with appropriate keyboard and cash drawers. I would like to link the counter and I have my desktop computer server. How do I get the software and the installation of the system?

I get a portable code reader for inventory or should I rent one?