From drones and bots to social shopping and smart e-receipts: NRF’s Artemis Berry gives us a rundown of the most thought-provoking pitches at NRF tech.

Amazon, Apple, Google and Facebook are just a few of the companies that are the pace cars in today’s innovation race. But there are thousands of other businesses just waiting to be discovered, ready to disrupt consumer behavior and retail as we know it.

For the second year in a row, attendees at NRFtech heard from 18 startups as a part of the “Tour of the Possible” program, curated by our great partners at Iterate Studio, a marketplace of startups indexing more than 135,000 companies focused on digital innovation.

Here’s a list of the 18 startups, who they are, what they do and why you should care.

Twyst — This “Internet of Everything” tech company allows the anonymous tracking of shoppers as they move through the store, and “smart connected bags” can be embedded into any type of mobile checkout process. We learned at last month’s Digital Experience Workshop that Twyst is partnering with digital retailer eBags to create “the world’s smartest professional backpack,” using RFID technology to notify users if specific items aren’t in their bag.