Please see https://github.com/Ayms/bitcoin-transactions this is a merge of former bitcoin-transactions and bitcoin-wallets nodejs modules with additional features to be implemented as described in the README

It is financed by NLnet via EU Horizon 2020 Next Generation Internet Search and Discovery call

So the initial dev fees have been removed and the code is now open source and provided in clear under a MIT license

The intent is to provide all the necessary tools for anybody to discover and manage their coins, as well as making transactions by themselves, without having to sync a full node or as an alternative to wallets when people don't understand where their coins are (we saw quite a lot of confusion for people not understanding at all how to find their coins and to what keys their addresses did relate in case of multisig, segwit and now bech32)

It's somewhere bitcoin-cli outside of bitcoin core more easy to use and not restricted to its own wallet, available for any bitcoin based coins

At the end it will be a secure standalone offline js webapp inside browsers (like https://peersm.com/wallet but the app does not reflect the current state of the nodejs repo)

It's not a remake of iancoleman's tool but of course some features overlap, as well as for other existing tools, we will also extend all of this inside one tool with no limitations (for example some tools do not accept "invalid" bip39 seeds, or bip32 seeds, etc)