The best alternatives to Bitpowr Technologies are Blockchain Demo, Po.et, and Jaxx. If these 3 options don't work for you, we've listed a few more alternatives below.
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Haggle — A CTA buyers want to click, when they aren't ready to demo
Blockchain Demo is my attempt at demystifying the technology behind cryptocurrencies. It has a living blockchain, a peer-to-peer network, and a user tour.