Open-source alternatives to Async Task

async-std is a Rust asynchronous runtime and non-blocking I/O library. It serves as an asynchronous standard library, providing a set of alternatives to the core Rust library for managing concurrent tasks, networking, and file system access. The project implements a standard-library-mirrored API, offering asynchronous versions of existing synchronous types to maintain a familiar interface. This approach allows for asynchronous Rust development using an interface that reflects the ergonomics of the language's standard library. The runtime includes a task executor for scheduling and executing

Failsafe is a JVM fault tolerance library and resilience pattern framework. It provides a toolkit for implementing circuit breakers, rate limiters, and other stability patterns within Java Virtual Machine applications to prevent cascading failures in distributed systems. The project is distinguished by its policy-based execution pipeline, which allows for the composition of multiple resilience patterns into a sequential flow. It features a state-machine circuit breaker to manage service recovery and a leaky-bucket rate limiter to control operation frequency. The library covers a broad range

This project is an educational codebase and asynchronous network implementation of a Redis-compatible server and client. It serves as a demonstration of the Tokio asynchronous runtime, providing a networked key-value store and a messaging system. The project implements the Redis Serialization Protocol to communicate between clients and servers using byte streams. It features a pub-sub messaging system that allows clients to subscribe to named channels and receive real-time updates. The implementation covers asynchronous network programming, including concurrent TCP connection handling and by

ConcurrentQueue is a header-only C++ template library that provides a lock-free data structure for multi-producer multi-consumer thread communication. It functions as a synchronization primitive designed to coordinate data flow between concurrent execution units using atomic operations rather than traditional mutex locking. The library distinguishes itself through a design that minimizes contention and synchronization overhead. It utilizes sub-queue token mapping to distribute workloads across partitioned internal queues and supports bulk operations to transfer multiple data elements in singl

Openclaw is a platform for managing agent execution environments, providing the infrastructure to control agent lifecycles, session state, and workspace persistence. It features a centralized gateway that handles model loops, tool invocation, and streaming events, while supporting multi-agent routing and persistent memory management. The system is designed to normalize tool execution signatures and provide a standardized interface for cross-provider compatibility. The platform includes extensive developer tooling, such as a command-line interface for workspace management, diagnostic logging,

Qinglong is a containerized task scheduler and automation platform designed to orchestrate recurring background jobs. It provides a centralized dashboard for managing, scheduling, and executing scripts across multiple programming languages, ensuring consistent environments through isolated container-based execution. The platform distinguishes itself by integrating remote repository synchronization, allowing users to clone and update external script collections directly within the system. It combines this with comprehensive environment variable management, enabling the secure storage of creden

Remotely Save is a cloud storage synchronization tool and backup manager designed to keep local files and application data consistent across desktop and mobile devices. It functions as a cross-platform synchronizer that mirrors local data to remote servers using S3 and other cloud protocols. The project focuses on privacy and security through end-to-end encryption, which secures files with a user-defined password before they are uploaded to remote cloud services. It ensures data remains private on third-party servers by applying symmetric client-side encryption. The system includes capabilit

Leaf is a game server framework written in Go designed for building multiplayer game backends. It provides a modular backend architecture that organizes server logic into independent modules and includes a concurrent task scheduler for managing ordered, delayed, or recurring functions. The framework features a TCP and WebSocket server that manages simultaneous connections through a single interface. It incorporates a message router capable of decoding Protobuf and JSON data to map incoming network packets to specific internal server modules. The system includes capabilities for multi-protoco

Greenlet is a multi-threaded asynchronous executor and web worker task runner. It serves as an execution wrapper that offloads heavy computation to background workers to maintain user interface responsiveness and prevent the main execution thread from blocking. The project includes a transferable object handler designed to move large data buffers between threads. This mechanism avoids the overhead of memory copying to optimize data transfer. The library covers the management of web workers, facilitating asynchronous task isolation and main thread offloading.

Bull is a Node.js library for managing distributed jobs and message queues using Redis as the primary data store. It functions as a distributed task worker, job scheduler, and priority queue manager designed to handle asynchronous workloads across multiple processes. The project distinguishes itself by providing a persistent communication channel that decouples servers through the exchange of serializable data objects. It ensures distributed system reliability by detecting stalled tasks and recovering from process crashes to ensure every queued job is completed. The system covers a broad ran

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Botasaurus is a Python web scraping framework and headless browser automation system used to build scalable data extraction tools. It functions as a web data extraction tool and OCR document parser, converting website content, images, and PDF files into structured formats such as JSON, CSV, and Excel. The framework distinguishes itself by providing a scraper management interface that allows Python functions to be wrapped in a web-based UI or deployed as standalone desktop applications. This enables non-technical users to trigger extraction jobs and manage tasks via a graphical interface or RE

This is a collection of academic programming projects that accompany an operating systems textbook, designed to teach core OS concepts through hands-on implementation. The projects span the major subsystems of an operating system, including process scheduling, memory management, file systems, and concurrency, with students building components from scratch in a simulated environment. The projects are structured to cover the full range of OS internals, from low-level kernel development to user-space system programming. Students implement lottery-based CPU schedulers, dynamic heap memory allocat

AzurLaneAutoScript is a mobile game automation system designed to perform repetitive gameplay tasks unattended. It functions as a screenshot-driven bot that controls Android devices, emulators, and cloud phones via ADB and uiautomator2, using computer vision to make interaction decisions instead of fixed timers. The project distinguishes itself through an advanced computer vision suite that includes local optical character recognition and perspective-aware grid detection. These tools allow the bot to parse 3D game maps, compute vanishing points, and normalize grid-centered objects for precise

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jdpro is a dockerized automation bot and scheduled task runner designed to automate reward collection and the conversion of expiring digital assets. It operates as a set of scripts deployed via containers to ensure consistent installation and execution across different hosts. The project includes a specialized authentication system that transforms raw keys and manages session cookies through environment variables to maintain automated login states. It also features a webhook notification manager that routes task updates to external services, utilizing keyword-based filtering and payload split

Failsafe is a JVM resilience library providing a collection of fault tolerance patterns for Java applications. It functions as an asynchronous execution wrapper that runs tasks in the background and returns futures to prevent thread blocking. The library allows for the composition of resilience policies, enabling multiple patterns to be stacked into a sequential pipeline. It includes specific implementations for circuit breaking to prevent system overload, rate limiting to control traffic flow, and a framework for managing retries and fallbacks. Capability areas cover traffic management thro

q is a JavaScript promise library and asynchronous flow controller designed to manage non-blocking operations. It serves as a system for coordinating parallel tasks and sequencing asynchronous workflows through task chaining and error propagation. The library distinguishes itself with specialized debugging tools that capture long stack traces across asynchronous jumps and monitor unhandled rejections to prevent silent failures. It also functions as a remote object proxy, forwarding method calls to remote targets and routing responses back through promises. The project provides comprehensive

This project is a structured Rust programming curriculum and systems programming course designed to take learners from beginner to expert levels. It provides a comprehensive set of training materials focused on mastering the core syntax, idioms, and technical foundations of the Rust language. The project features a specialized language transition framework that maps concepts from C++, managed languages, and dynamic typing to Rust idioms. This allows developers from different ecosystems to translate architectural patterns and memory models into idiomatic Rust. The training covers a broad rang

This is an open-source, crowd-sourced wiki textbook that teaches Linux system programming in C. It covers the core operating system concepts of process management through the fork-exec-wait model, dynamic memory allocation using implicit free list heap allocators, inode-based file systems, inter-process communication via pipes and shared memory, POSIX threads with synchronization primitives, signal-based asynchronous notification, virtual memory with page table translation, and runtime diagnostics using Valgrind and GDB. The textbook distinguishes itself by providing practical, implementation

Asio is a C++ library for performing network and low-level I/O operations using a consistent asynchronous model that avoids blocking program execution. It provides a portable, cross-platform interface for network socket communication across different operating systems, and manages multiple asynchronous operations without requiring explicit thread management or locking. The library implements a proactor-based asynchronous model where operations post completion handlers to a queue for later execution, and wraps operating system I/O multiplexing mechanisms like epoll, kqueue, IOCP, and select in

monoio is a high-performance asynchronous runtime and executor for Rust. It implements a thread-per-core concurrency model that pins tasks to specific CPU cores to eliminate synchronization overhead and data migration. The runtime leverages the io_uring interface to perform non-blocking system calls and reduce kernel-user mode memory copying. It utilizes a high-performance I/O driver and zero-copy TCP stream wrapping to manage data transfer via shared-memory buffers. The project provides capabilities for CPU core affinity management, low-latency system programming, and high-performance netwo

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

Semaphore is a web interface and API for running and scheduling Ansible playbooks and other infrastructure automation tools. It serves as an infrastructure automation dashboard and DevOps task scheduler for orchestrating deployments. The platform functions as a multi-tool automation hub, providing a centralized dashboard for managing infrastructure as code using Ansible, Terraform, OpenTofu, and Terragrunt. It includes an inventory management tool for organizing target servers and containers, alongside a secret management service for storing sensitive environment variables required during exe

Future is a unified framework for parallel and distributed computing in R that abstracts infrastructure complexity to enable asynchronous task execution. It provides a consistent interface for dispatching intensive computations to local multicore processors or remote clusters, allowing developers to manage background jobs without blocking the main session. The framework distinguishes itself through a strategy-based execution abstraction that decouples task definitions from the underlying compute backend. This allows for the seamless swapping of execution environments while maintaining global

This project is a Python workflow orchestration platform and programmatic data pipeline engine used to author, schedule, and monitor complex data pipelines. It functions as a directed acyclic graph manager and scheduler, allowing users to define data movement and transformation tasks as code to ensure precise execution order and maintainability. The platform distinguishes itself by treating workflows as code, enabling pipelines to be versioned and tested through a standard programming language. It utilizes a system of extensible operators to encapsulate integration logic and employs a templat