We've been building Apache ResilientDB (incubating), a lightweight, modular, and high-performance open-source blockchain framework written in C++. Recently accepted into the Apache Incubator, ResilientDB is designed for flexibility, supporting various Byzantine Fault-Tolerant (BFT) and Crash Fault-Tolerant (CFT) consensus protocols, with native PBFT integration.

With features like dynamic client-server architecture, robust checkpoint/recovery, and smart contract support, ResilientDB aims to push distributed ledger tech further. Check us out and join our community: Apache ResilientDB GitHub (https://github.com/apache/incubator-resilientdb).

Would love your feedback!