Non-profit & ngo

Email-based customer support application, help desk and shared mailbox (alternative to Zendesk and Help Scout).

Easy to use but powerful support and ticketing system.

Helpdesk software which helps you streamline your company's support, offers an easy setup, clean user interface, and automation tools to resolve customer queries efficiently.

Modern omnichannel customer support desk. Live chat, email, and more in a single binary.

Allows your customers to book appointments with you via the web.

Event management and ticketing platform for conferences, concerts, and more. Offering customizable event pages and embeddable ticket widgets.

GLPI is a Free Asset and IT Management Software package, Data center management, ITIL Service Desk, licenses tracking and software auditing.

Ticket sales platform for events.

Bug tracker, fits best for software development.

Feature-rich event management system, made @ CERN, the place where the Web was born.

General-purpose bugtracker and testing tool originally developed and used by the Mozilla project.

Ticket reservation system.

Real-time error tracking for your applications with all the details in one place. Easy setup with clear instructions included.

A comprehensive Domain-Driven Design example with problem space strategic analysis and various tactical patterns.

A Telegram ticketing/supporting system.

A collection of badass modules and utilities to help you level up your NestJS applications 🚀

Marketing, sales, and customer service platform designed to help businesses attract more engaged customers.

Building event-driven applications the easy way in Go.

CiviCRM (Core Application and Framework)

Flexible web-based ticketing system used for customer service, help desk, IT service management.

Event Sourcing and CQRS in practice.

Znuny is a free, open-source, and versatile web-based ticketing system for Customer Service, Help Desk, IT Service Management, and more. It is built for transparency and long-term sustainability and is highly tailorable to your organization's needs.

Visual bug reporting and ticketing tool for web applications.

A curated collection of Open WebUI plugins - tools, skills, filters, pipes, actions and events that extend your AI chat experience.

Manage complex group hierarchies with members, events and a lot more.

🌵 Federated mobile first open-source RSVP platform. Alternative for meetup.com & eventbrite and partiful for small companies and groups.

Trigger and listen to events within a PHP application

Python SDK for CloudEvents

Fast and easy-to-use event-driven network library.

Web-based event management, including running a Call for Papers, reviewing submissions, and scheduling talks. Exports and imports for various related tools.

OCaml promises and concurrent I/O

A Chrome 🌐 & Firefox 🦊 extension to discover the latest developer news and tools in one tab!

Event Ruler is a Java library that allows matching many thousands of Events per second to any number of expressive and sophisticated rules.

Community-focused event management and ticketing platform.

Ruby and Rails efficient Kafka processing framework

Event management tailored to free Software conferences.

🎩 A tiny but capable push & pull stream library for TypeScript and Flow

Home of Quamina, a fast pattern-matching library in Go

Pure PHP Implementation of MySQL replication protocol. This allow you to receive event like insert, update, delete with their data and raw SQL queries.

Minimal events aggregator.