RA Seek / Brickseek Extension: This tool is for people that do RA (retail arbitrage) sourcing. It will allow you to grab UPC codes from any website that it is displayed on, Google drive sheets and especially search results from Tactical Arbitrage (or OAXray or similar programs that show UPC codes).
Merchlab.io - Merch by Amazon design research program. When it comes to Amazon data, they know how to pull it, organize it and present it back to you in a way that's meaningful to your Merch empire. They can help you 10x your print-on-demand business and scale it quickly.
PlaceIt: T-Shirt mockup generator for your print on demand designs. Make eye catching social media posts to advertise your designs. Over 5000 model & solo t-shirt templates to choose from.