Open-source alternatives to Example Echo Server

Granian is a Rust-based HTTP server written specifically to serve Python web applications. It supports the three major Python gateway interfaces—ASGI for asynchronous apps, WSGI for synchronous apps, and RSGI for async requests—while also handling HTTP/1.1, HTTP/2, and WebSocket connections through automatic protocol negotiation. Architecturally, Granian uses a multiprocess worker model that isolates requests across CPU cores and provides configurable threadpool-limited concurrency to control backpressure per worker. It includes built-in Prometheus metrics exposition for connection counts and

Shepherd is an interactive product tour framework and JavaScript onboarding library used to build step-by-step instructional journeys. It serves as a web application guidance tool that presents sequences of instructional overlays to help users navigate interfaces and discover features. The library enables the creation of guided user tours, onboarding experiences, and interactive application guides. It is used to provide contextual in-app education and drive product feature adoption by leading users through specific workflows. The framework utilizes configuration-driven tour definitions and a

An example codebase that shows how to create a web application in Gleam. It is a backend based implementation of TodoMVC and demonstrates these features:

📦 Search for Gleam packages on Hex.