This is Bitcoin Core. One implementation of Bitcoin.

That changed:

- UPnP Replaced with PCP and NAT-PMP

- Dynamic Tor Onion Port Assignment

- Enhanced Orphan Transaction Handling

- Ephemeral Dust Output Allowance

- Build System Switched to CMake

- Increased RPC Threads and Work Queue

- Stricter Security Parameter Checks

- Improved Sync and P2P Network Management

- New BitVM Bridge Transaction Template