Open-source useful tools

Closed-source softwares are not allowed in this page

Anyway, in general, never use closed-source tools when bitcoins are involved, for obvious reasons

Client forks

Import/export transactions

Wallet managing: import/export/delete addresses and transactions, recover *coins sent to Bitcoin addresses

Sign/verify messages and files with Bitcoin addresses

Recover wallets from reformatted drives

List of blocks and transactions

List of unconfirmed transaction

Visualize the activities on the Bitcoin network