Before Filecoin, there was Sia: Try a hands-on demo of its file storage techtrysia.tech 3jav4ydiscuss
The IPFS Wikipedia mirror is from 2017; an up-to-date snapshot is now on Skynetsiasky.net 1jav5ydiscuss
What is Ethereum, 2nd gen. cryptocurrency, good for? – a visual exampleethereumpyramid.com 2jav10ydiscuss
What is Ethereum, the 2nd gen. cryptocurrency, good for? – a visual exampleethereumpyramid.com 3jav11ydiscuss
Ethereumpyramid.com – visualizing the state of an Ethereum pyramid contractethereumpyramid.com 1jav11ydiscuss
Bitcoin payment terminal combines NFC and Bluetooth for offline paymentssignup.thebitcoinbox.com 2jav11ydiscuss
Video of a Bitcoin point of sale solution using NFC for contactless paymentyoutube.com 2jav12ydiscuss
Using Bitcoin, NFC and Bluetooth to make a mobile euro payment in 15 secondsbridgewalkerapp.com 3jav12ydiscuss
Bridgewalker: an exchange rate adjusted Bitcoin wallet (now with short demo)bridgewalkerapp.com 1jav13ydiscuss
No central authority needed: Bitcoin is a p2p digital currency. See it in actionbitcoinmonitor.com 1jav15ydiscuss
Bitcoin is a p2p-based digital currency. This site visualizes the network state.bitcoinmonitor.com 4jav15ydiscuss