Open-source alternatives to PushSharp

node-apn is a Node.js library and push notification driver used to send remote notifications to Apple devices via the Apple Push Notification service. It functions as an HTTP/2 client that manages the construction and transmission of JSON payloads to the Apple notification gateway. The library supports multiple identity verification methods, including certificate-based authentication using PEM or PFX files and token-based authentication with automatically renewing tokens. It includes capabilities for routing traffic through intermediary proxy servers and secure HTTP tunnels to bypass restrict

pypush is a Python client library and programmatic interface for the Apple Push Notification service. It provides the necessary tools to send and receive push notification messages and functions as an iMessage client implementation. The library enables the registration of devices with Apple services to receive push notifications and interact with internal application interfaces. It achieves this by emulating the handshake and identity of physical Apple devices to authenticate with proprietary push notification servers. The system manages communication through binary frame serialization, sess

Apprise is a notification library and command-line utility that provides a unified interface for sending alerts to a wide range of messaging, email, and push services. It abstracts the complexities of diverse third-party communication APIs, allowing users to dispatch notifications through a single, standardized method. The project utilizes a connection-string-based routing system to map notification requests to specific service drivers. It features a modular plugin architecture that supports the integration of new messaging platforms and custom notification hooks. Users can organize service e

Helios is a mobile backend as a service providing a server-side platform to manage user accounts, push notifications, and data synchronization for mobile applications. It functions as a REST API framework that automatically generates database tables and standard web service endpoints from defined data models. The project implements specialized services for the Apple ecosystem, including a Passbook service for managing digital passes and device registration. It also provides an in-app purchase verification service to decode purchase receipts and validate product identifiers through external ve

Devhub is a cross-platform developer tool and event aggregator designed to monitor GitHub activities. It provides a unified interface for tracking issues, notifications, and user actions across multiple repositories, consolidating these updates into a single view to reduce notification clutter. The application utilizes a multi-column dashboard for organizing data streams via customizable filters and saved searches. This interface allows for the management of review queues, the monitoring of specific user actions, and the display of notification context without requiring navigation to the sour

Bark is a self-hosted push notification system for iOS devices that bridges HTTP requests to Apple's Push Notification service. It provides a complete pipeline for sending custom alerts from scripts, cron jobs, or CI pipelines directly to an iPhone, with the server component designed for Docker-based deployment on personal infrastructure. The system distinguishes itself through automated notification handling capabilities. When a push arrives, Bark can automatically copy the notification body or a custom value to the iOS clipboard, open a specified URL when the user taps the notification, and

Azure Docs is the official technical documentation repository for Microsoft Azure, the cloud computing platform. It provides comprehensive guidance on the full spectrum of Azure services, covering everything from core infrastructure components like virtual machines, Kubernetes clusters, and serverless computing to platform services for AI, machine learning, data analytics, and storage. The documentation details how to provision, manage, and govern cloud resources at scale, including policy enforcement, identity management, and cost optimization. The documentation distinguishes Azure through i

Mumble is a low-latency voice over IP system designed for real-time communication. It provides a self-hosted, encrypted voice server that secures data transmission using public-private key authentication and digital certificates. The platform distinguishes itself through a request-response protocol for remote configuration and integration with external automation scripts. It also features a graphical overlay that renders active speaker information and chat status on top of other running applications, as well as positional audio to simulate the 3D spatial location of speakers in a virtual envi

This is a Go notification library and multi-channel router used to send messages and alerts to multiple external messaging platforms through a single standardized interface. It functions as a cross-platform alerting bridge, routing internal application events to diverse destinations. The project enables the simultaneous dispatch of a single notification across a collection of configured providers. It provides a unified interface for managing webhooks and API requests to third-party chat and alert services. Supported delivery channels include Discord, Matrix, PagerDuty, and various mobile pus

Corda is a distributed ledger technology platform used to build private, interoperable business networks. It provides a framework for creating shared records of facts and executing smart contracts between specific participants without requiring global data broadcasting. The platform distinguishes itself through a point-to-point state distribution model and a UTXO-based ledger, ensuring that transaction data is shared only between involved parties to maintain strict privacy. It utilizes a JVM-based smart contract engine to execute business logic written in Java or Kotlin and employs a notary-b

TigerVNC is a remote desktop software system consisting of a server and client implementation. It enables the streaming of graphical desktop environments across different operating systems by implementing the RFB protocol to exchange pixel data and input events. The software provides secure remote access through password authentication and the use of cryptographic certificates to verify remote server identities. It facilitates remote system management by capturing a local display on a server and forwarding it to a viewer application for remote control. The system includes capabilities for di

This project is a collection of reference implementations, sample code, and starter kits for integrating Firebase backend services into web applications using the JavaScript SDK. It serves as a practical guide for bootstrapping projects with cloud-hosted authentication, databases, and serverless logic. The repository provides specific examples for implementing real-time data synchronization, user identity management, and event-driven cloud functions. It also includes reference code for using local service emulators to test cloud functionality on a local machine before production deployment.

Signal-Server is a distributed communication backend and end-to-end encrypted messaging server. It serves as a secure message relay that implements the Signal Protocol to manage identity keys and session states for private communications. The system functions as a cross-platform messaging backend that coordinates the delivery and exchange of encrypted messages between clients. It is designed to route private data between users while ensuring the server cannot access the conversation content. The infrastructure provides secure communication capabilities through a relay-based delivery model an

ssh3 is a secure shell implementation that uses HTTP/3 and the QUIC protocol as its transport layer to reduce handshake latency and improve connection stability. It provides a remote terminal environment where server identities are verified using standard HTTPS X.509 certificates instead of traditional host keys. The project integrates modern identity verification through OpenID Connect and OAuth 2.0, allowing user authentication via external identity providers. To prevent discovery by public scanners, it includes a server obfuscation feature that requires a secret URL path for client request

iosched is an Android event scheduling application designed for browsing conference sessions, reserving seats, and managing personal event schedules. It serves as a cloud-synced event manager that keeps user preferences and reservations synchronized across devices. The project provides specialized tools for conference navigation, including integrated maps and informational pages to guide attendees through physical venue spaces. It also functions as a real-time notification client that delivers live updates regarding schedule changes and session availability. The application covers broad capa

This project is a containerized IPsec VPN server designed to provide secure remote network access. It functions as an IKEv2 VPN gateway, utilizing the StrongSwan daemon to manage security associations and establish encrypted tunnels between remote clients and a private network. The server acts as a certificate-based VPN manager, handling the generation and distribution of digital certificates and pre-shared keys to authenticate remote users. It includes tools for IKEv2 client management to automate the creation of configuration profiles and security keys for connecting devices. The system co

XMPPFramework is an Objective-C communication framework and networking library used to build instant messaging applications for Mac and iOS. It provides a programmatic foundation for implementing XMPP clients, managing real-time message exchange, and processing structured XML streams between network endpoints. The framework features a modular plugin architecture and extension system that allows for the integration of custom communication capabilities and protocol extensions into the data stream. It distinguishes itself with specialized support for OMEMO end-to-end encryption and a state-based

PiVPN is an automated VPN deployer and server manager designed to establish secure gateways for remote network access. It provides a command-line tool for the installation and configuration of WireGuard and OpenVPN servers on Linux systems, with specific optimizations for single-board computers like the Raspberry Pi. The project distinguishes itself through a wrapper-based management interface that abstracts complex server commands into simplified operations. This includes automated handling of firewall rules, port forwarding, and package installation, as well as the ability to export client

Ligolo-ng is a network tunneling framework and control server designed for managing remote agents and coordinating network routing. It functions as a reverse tunneling proxy and a site-to-site VPN tool, utilizing a userland TUN interface to pivot network traffic through remote agents. The project distinguishes itself by using a TUN interface routing system to forward TCP, UDP, and ICMP traffic through multiple remote agents. It implements a C2 model where a central server manages remote agents to bypass firewall restrictions and provide direct subnet access to isolated networks. The system c

A Gleam client for the Pushover push notification API.

The first and complete Web Push notification library for Gleam! 🎉

iOS9AdaptationTips is a collection of technical strategies and guides for adapting mobile applications to the iOS 9 operating system. It serves as a development resource for implementing system integration, UI layout adaptations, and push notification configurations. The project provides specific guidance on flexible interface implementation, including support for split-screen modes, dynamic text scaling, and status bar configurations. It also covers the use of secure certificates and heartbeat signals to maintain persistent connection stability for push notifications. The material covers br

Amnezia Client is a cross-platform VPN client application and server orchestrator designed to manage secure tunnels and automate the deployment of containerized VPN services on remote self-hosted servers. It functions as a multi-protocol VPN manager that supports various tunneling standards to ensure connectivity across restrictive network environments. The project distinguishes itself through network traffic obfuscation, which disguises VPN traffic as common web protocols or DNS requests to bypass deep packet inspection and censorship. It further enables the automation of remote server admin

SSH.NET is a .NET library that implements the SSH-2 protocol for encrypted remote connections and secure file transfers. It provides a complete SSH-2 protocol stack implementation with a channel multiplexing engine that manages multiple concurrent channels over a single connection, supporting simultaneous shell sessions, remote command execution, SFTP transfers, and port forwarding tunnels. The library includes a pluggable authentication pipeline supporting password, public key, certificate, keyboard-interactive, and multi-factor authentication combinations. The library distinguishes itself t

Pigsty is a full-stack orchestration suite for deploying, monitoring, and managing high-availability PostgreSQL clusters and their supporting infrastructure. It functions as a cluster management platform and high-availability suite that automates failover, manages virtual IPs, and ensures data consistency through distributed consensus. The project distinguishes itself by providing a comprehensive database infrastructure-as-code framework and a dedicated observability stack. It incorporates a backup and recovery manager supporting point-in-time recovery via S3-compatible object storage, alongs

Uptime Kuma is a self-hosted monitoring platform designed to track the availability and performance of network services and websites. It functions as a centralized dashboard that executes asynchronous health checks on a scheduled interval, providing real-time visibility into infrastructure health and service uptime. The platform distinguishes itself through a dedicated notification engine that dispatches alerts across multiple third-party messaging services, alongside a public status page generator that allows users to communicate service health and historical metrics via custom domains. Its