Ask HN: Point of Sale system APIs for integration?

Last I talked with these guys this is their secret sauce.

This looks perfect. Do you know how long they've been around?

not long, about a year I think.

Look at OPOS for peripheral interfaces. If I remember correctly there is a java version as well.

eThor.com looks interesting, what POS systems do they integrate with? The market is very fractured (RMS touch, aloha, positouch etc); I used to install them, and at one point flirted with developing an app to integrate (went a different way and used qrcodes :( instead). Each company requires a developer license, and they are expensive, 7-25,000$ each.