Open-source alternatives to Failsafe

Resilience4j is a fault tolerance library for Java 8 applications designed to handle failures in distributed systems. It provides a comprehensive suite of resilience patterns including resource isolation, request throttling, retries, and timeouts. The project implements specific stability mechanisms such as circuit breakers to prevent cascading failures, bulkheads for system resource isolation, and rate limiters to cap execution rates. It also includes a retry framework with backoff policies and timeout enforcement to manage transient faults and maximum execution durations. Additional capabi

This project is a comprehensive educational resource and curriculum focused on site reliability engineering, distributed systems, and infrastructure operations. It provides technical guides, a systems engineering course, and instructional manuals designed to teach the principles of managing large-scale computing environments. The curriculum covers high-level architectural design for scalability and resilience, including fault-tolerant infrastructure, high-availability patterns, and microservices decomposition. It emphasizes the practical application of site reliability engineering through the

Tenacity is a Python retry library and fault tolerance framework designed to automatically re-execute failing functions based on custom conditions, wait intervals, and stop criteria. It provides a mechanism to apply retry logic to both synchronous functions and asynchronous coroutines. The library implements exponential backoff to increase delays between retries, helping to manage transient network failures and prevent the overloading of services. Its capabilities cover the definition of retry conditions based on exception types or return values, as well as the enforcement of duration limits

Sidekiq is a background job processor and queue manager for Ruby that uses Redis to manage asynchronous tasks. It functions as a distributed task scheduler capable of handling periodic, delayed, and recurring jobs across a cluster of worker processes. The project features a job monitoring dashboard and administrative web interface for visualizing system state, tracking worker performance, and managing failed or dead jobs. It provides a distributed rate limiter to control execution frequency across multiple processes. The framework covers a broad range of operational capabilities, including j

Easegress is a cloud-native traffic orchestration platform that functions as a multi-protocol API gateway and service mesh proxy. It routes, transforms, and orchestrates HTTP and MQTT traffic through configurable filter chains, providing high availability, security controls, and resilience for backend services. The platform integrates with service discovery systems like Kubernetes, Consul, and Eureka to dynamically route traffic to discovered services with automatic failover and health monitoring. The system distinguishes itself through a pipeline-based filter chain architecture where request

Sentinel is a microservice flow control framework designed for managing traffic limits, distributed circuit breaking, and adaptive overload protection. It serves as a traffic shaping component that defines resource boundaries to regulate request flow and ensure reliability across distributed systems. The project provides a real-time monitoring dashboard for tracking resource metrics and performance bottlenecks across service clusters. It includes a visual interface for the real-time management of flow control and circuit breaking rules, allowing parameters to be updated without restarting the

This is a learning collection of example projects that demonstrate core Spring Cloud patterns for building microservice architectures. The repository covers the fundamental building blocks of a microservices system, including service discovery through a central registry, centralized configuration management from Git or SVN repositories, API gateway-based request routing, circuit breaker patterns for fault tolerance, and distributed request tracing across service boundaries. The examples show how to implement service registration and dynamic discovery so that clients can locate microservices b

Radash is a TypeScript functional utility library designed for data transformation, validation, and workflow management. It provides a collection of typed helper functions to manipulate arrays, objects, and strings. The project features an asynchronous workflow toolkit for managing promises, retries, and concurrency limits, alongside a suite of boolean validators for verifying primitive types, objects, and promises. It also implements functional programming patterns such as function composition, partial application, and error-first response patterns. The library covers a broad surface of cap

Amp is a non-blocking concurrency framework for PHP. It provides a core infrastructure for writing asynchronous applications using an event loop to schedule operations, timers, and signals within a single process. The project implements a coroutine library that utilizes fibers to suspend and resume function execution. This allows the system to handle concurrent tasks without blocking the main execution thread, optimizing CPU usage during input and output operations. It further manages pending operation results through a future and promise implementation. The framework covers a broad range of

pysheeet is a technical reference library providing a curated collection of code snippets and implementation patterns for advanced Python development, system integration, and high-performance computing. It serves as a comprehensive guide for implementing low-level network programming, native C extensions, and asynchronous and concurrent programming. The project provides specialized frameworks for the development and deployment of large language models, including tools for distributed GPU inference and high-performance serving. It also includes detailed patterns for high-performance computing

This project provides a framework for managing multi-agent systems, designed to automate complex software development, infrastructure, and business workflows. It functions as a multi-agent workflow orchestrator that routes tasks to domain-specific workers while maintaining state persistence and infrastructure automation. By leveraging large language models, the system decomposes high-level objectives into actionable plans, ensuring that complex operations are executed with consistency and reliability. The framework distinguishes itself through its hierarchical agent registry and policy-driven

🌳 Tiny & elegant JavaScript HTTP client based on the Fetch API

Reactor Core is a reactive programming toolkit and non-blocking foundation for composing asynchronous data pipelines on the JVM. It serves as an asynchronous stream processing framework and a backpressure management system, allowing developers to transform, filter, and combine sequences of events while regulating data flow between producers and consumers to prevent resource exhaustion. The library differentiates itself through a sophisticated concurrency scheduling system and demand-based flow control. It decouples signal processing from specific threads using a scheduler registry and provide

Async-task is a low-level Rust concurrency library and asynchronous task executor designed for building custom asynchronous runtimes and managing background task execution pipelines. It provides concurrency primitives that handle atomic task state management, heap-allocated futures, output retrieval, and type-erased execution handles. The library coordinates task execution, cancellation, and polling states across multiple threads using lock-free atomic operations and reference counting. Developers can supply custom scheduling logic and metadata hooks that dictate when and how tasks are queue

Neogit is a visual Git version control client designed for managing repositories through staging, committing, pushing, and merging. It provides a suite of tools for inspecting code differences, visualizing commit history via a graphical branch tree, and automating event-based workflows. The project features a workflow automation system that triggers custom logic and notifications based on repository events, such as branch creation or pushes. It also includes utilities for generating direct deep-links to commits, pull requests, and file structures on remote version control hosting providers.

This project is a framework for building concurrent, event-driven applications in Ruby. It provides a core engine that orchestrates non-blocking input and output operations, allowing developers to handle high-volume network traffic and system tasks without the complexity of traditional callback-based programming. By leveraging lightweight fibers, the library enables cooperative multitasking that maintains responsiveness during heavy data processing workloads. The framework distinguishes itself through a structured concurrency model that organizes tasks into parent-child hierarchies. This appr

PraisonAI is an autonomous AI agent platform that coordinates multiple LLM-powered agents for research, planning, and execution of complex workflows. It functions as a multi-agent orchestration framework, a workflow builder, and a Model Context Protocol server, while also providing retrieval-augmented generation through vector knowledge bases. Agents can interact via CLI, web, or standardized protocols with sandboxed code execution. The platform distinguishes itself with a rich set of agent communication protocols, including A2A, REST, WebSocket, voice and telephony integration, and MCP, allo

Dynamic Thread Pool is a Java framework for the dynamic management, observability, and orchestration of thread pools. It allows for the real-time adjustment of thread pool parameters via external configuration centers without requiring application restarts. The project distinguishes itself by providing middleware orchestration, enabling the interception and tuning of thread pools embedded within third-party web servers and RPC frameworks. It further supports distributed tracing by propagating execution contexts and metadata from submitting threads to worker threads to maintain observability a

🚀 A Complete Fast Android Networking Library that also supports HTTP/2 🚀

Nextcloud is a self-hosted platform designed for private cloud storage, file synchronization, and collaborative team workspaces. It provides a comprehensive suite of tools for document editing, groupware services like calendars and contacts, and secure data management, all while ensuring users maintain full control over their infrastructure and data sovereignty. The platform distinguishes itself through a decentralized federated architecture that allows independent server instances to securely share data and collaborate across a network. It features a highly modular plugin ecosystem, enabling

Deepagents is an LLM agent orchestration platform and stateful application server designed for deploying and managing AI agents built with computational graphs. It provides a containerized runtime environment that handles agent execution, state persistence, and the versioning of AI assistants. The platform distinguishes itself through deep integration with the Model Context Protocol, allowing agents to function as servers that expose tools and capabilities to external clients. It features a sophisticated observability suite for capturing execution traces, performing LLM-based evaluations agai

Synapse is a Matrix homeserver implementation that provides the infrastructure for decentralized, real-time communication and messaging. It functions as a federated chat server that synchronizes room data and event streams across independent server instances to enable cross-domain interoperability. The server utilizes a hybrid core that integrates performance-critical logic in Rust with a Python orchestration layer. It employs a PostgreSQL relational database for persisting user accounts and conversation history, and uses a Redis-based messaging system to distribute tasks across horizontal wo

Akka.NET is an actor model framework used for building concurrent and distributed applications. It functions as a distributed computing platform and state manager that enables isolated actors to communicate via asynchronous message passing, ensuring thread-safe state management without manual locks. The project is distinguished by its decentralized coordination capabilities, including a distributed state manager that uses sharding and dynamic rebalancing to maintain high availability. It incorporates an event sourcing engine that persists state as a sequence of events in an append-only log an

OTP is a concurrent programming framework and distributed computing platform that serves as the Erlang runtime environment. It provides a fault-tolerant operating environment designed for building scalable, real-time systems that manage massive amounts of simultaneous tasks through asynchronous messaging. The environment is distinguished by its use of an actor-based concurrency model and hierarchical supervision trees that automatically restart failed processes. It supports hot code loading to allow system updates without downtime and utilizes a preemptive user-space scheduler to manage light

Kue is a Redis-backed job queue library for Node.js that provides a complete system for defining, scheduling, and processing background work. It stores job metadata and state in Redis lists and sorted sets, enabling persistent, in-memory operations with configurable concurrency control and priority-sorted processing. The library includes a RESTful HTTP API for managing jobs and a web-based monitoring dashboard for inspecting job status, progress, and logs. The system distinguishes itself through its event-driven worker model, where workers listen for job events via Redis pub/sub and process j

Akka Core is an actor model framework and asynchronous concurrency library used for building scalable and resilient distributed systems. It provides a distributed computing platform and fault tolerant runtime that manages communication and state across networked nodes. The system uses location-transparent messaging and a cluster management system to organize nodes into high-availability architectures. This allows for the creation of elastic clusters that scale resources on demand and coordinate distributed workloads. The platform handles concurrent state management and distributed systems or

Lunatic is a WebAssembly runtime and concurrent process manager that implements an Erlang-inspired model of lightweight concurrency and fault tolerance. It functions as a distributed actor system where isolated processes communicate via message passing across a network of linked nodes. The system utilizes a WebAssembly sandbox environment to isolate memory and restrict system call permissions for each individual process. This capability-based security model ensures that processes are sandboxed to safely execute untrusted code. The platform provides a fault-tolerant supervision tree for hiera