Projects Related with bitcoin

1. bisq

under GNU Affero General Public License v3.0 license
A decentralized bitcoin exchange network
2. bither-android

under Apache License 2.0 license
Bither - a simple and secure Bitcoin wallet!
3. thunder

under GNU Affero General Public License v3.0 license
Off-Chain Bitcoin payments using smart contracts
4. api-v1-client-java

under MIT License license
Blockchain Bitcoin Developer APIs - Java
5. coursera-cryptocurrency

under MIT License license
Assignments from the Coursera course "Bitcoin and Cryptocurrency Technologies"
6. boilr

under GNU General Public License v3.0 license
Price alarms for Bitcoin, cryptocurrencies, cryptoassets, futures and options.
7. GreenBits

under GNU General Public License v3.0 license
GreenBits is a Bitcoin Wallet for Android provided by GreenAddress
8. ledger-javacard

under GNU Affero General Public License v3.0 license
Ledger Unplugged - Java Card implementation of Ledger Bitcoin Hardware Wallet
9. Bitcoin

under Apache License 2.0 license
An example Bitcoin implementation which can be used to learn about Bitcoin/Blockchain. This implementations is for educational use only!
10. hadoopcryptoledger

under Apache License 2.0 license
Hadoop Crypto Ledger - Analyzing CryptoLedgers, such as Bitcoin Blockchain, on Big Data platforms, such as Hadoop/Spark/Flink/Hive
11. bitcoin-transaction-explorer

under MIT License license
Simple and pure block explorer you can run on top of a full node
12. dapp-wallet-demo

under Apache License 2.0 license
initialize etherum wallet using web3j & bitcoinj
13. coinbase-bitmonet-sdk

under BSD 2-Clause "Simplified" License license
DEPRECATED — Library to accept bitcoin payments in your Android App
14. BitcoinWallet

under MIT License license
Bitcoin and ETH wallet
15. SatochipApplet

under GNU Affero General Public License v3.0 license
Open source javacard applet implementing a Bitcoin hardware wallet with full BIP32 support
16. bop-bitcoin-client

under Apache License 2.0 license
BOP Bitcoin Client Libraries
17. gerbera

under MIT License license
Bitcoin offline transaction generator
18. bitcoincash-address-generator

under MIT License license
Provide the functionality to create a Bitcoin Cash address from a public key hash in the new cashaddress format (https://github.com/bitcoincashorg/bitcoincash.org/blob/master/spec/cashaddr.md)
19. thundernetwork

under GNU Affero General Public License v3.0 license
P2P Network to send Off-Chain Bitcoin Payments
20. bitcoin-verde

under MIT License license
Bitcoin Verde is a Java full-node implementation of the Bitcoin Cash protocol. Fully indexed, Bitcoin Verde is a unique, from the ground-up, implementation. Bitcoin Verde provides a block explorer, development library, and network implementation diversification.
21. bitcoinpos

under MIT License license
This project provides a Bitcoin Point of Sale system to allow merchants to accept bitcoins.
22. java-market-maker

under Apache License 2.0 license
Simple Market Making bot for Quedex Bitcoin Derivatives Exchange.