Open source. Open possibilities.

Protocol Buffers is Google's language-neutral, platform-neutral, extensible mechanism for serializing structured data. It includes a compiler and runtimes for multiple languages.

SovereignKit is open-source Solana infrastructure for measuring transaction accessibility failures, separating RPC acknowledgment from ledger evidence, detecting route asymmetry, and enabling bounded fail-open routing. v0.1 is a controlled proof plus Devnet validation, not a provider ranking.

Apache Dubbo is a Java-based RPC and microservice framework supporting multiple protocols like Triple (gRPC-compatible), Dubbo2 TCP, and REST, with service discovery, traffic management, observability, and Spring Boot integration.

Meteor is a full-stack JavaScript platform for building modern web, mobile, and desktop apps with one codebase. It integrates popular frontend frameworks like React, Vue, Svelte, and Blaze, and offers CLI tooling for rapid prototyping and deployment.

TundraLibs is a suite of independent, cross-runtime TypeScript libraries compatible with Deno, Bun, Node.js, Cloudflare Workers, and browsers. It provides modular tools for databases (ORM, drivers), authentication, validation, logging, tracing, caching, and HTTP routing.

aria2 is a lightweight, cross-platform command-line download utility supporting HTTP(S), FTP, SFTP, BitTorrent and Metalink, with segmented downloads, checksum verification and RPC interfaces.

A knowledge refresher project for internet Java engineers, systematically organizing interview and practical knowledge across 5 core backend architecture fields: high-concurrency architecture, distributed systems, high-availability architecture, microservice architecture, and massive data processing.