If you forgot your bitcoin wallet password you may just be able to recover it. We have discussed some other tools before such as Pywallet. Another password recovery tool, called btcrecover, is designed for the case where you already know most of your password, but need assistance in trying different possible combinations. The reactions seem positive, but we have not inspected the source code. Use at your own risk (disconnected computer?). It supports a large majority of the Bitcoin wallets:
- Armory
- Bitcoin Core (Bitcoin-Qt)
- MultiBit Classic
- Electrum
- Most wallets based on bitcoinj, including Hive for OS X
- mSIGNA (CoinVault)
- Blockchain
- pywallet –dumpwallet of Bitcoin Core wallets
- Bitcoin Wallet for Android encrypted backups
- KnC Wallet for Android encrypted backup
Download link: https://github.com/gurnec/btcrecover
Tutorial: https://github.com/gurnec/btcrecover/blob/master/TUTORIAL.md