
OpenSIPS is a GPL implementation of a multi-functionality SIP Server that targets to deliver a high-level technical solution (performance, security and quality) to be used in professional SIP server platforms.

OpenSIPS is a GPL-licensed, multi-functional SIP server designed for professional VoIP platforms requiring enterprise-grade performance, security, and reliability. It provides a robust, open-source alternative to proprietary SIP solutions, enabling developers and telecom providers to build scalable session initiation protocol infrastructure.
OpenSIPS is ideal for telecommunications professionals, VoIP service providers, system integrators, and developers building enterprise-grade communication infrastructure who need an open-source, high-performance SIP server solution. It's suited for those requiring customization capabilities and community-driven development without vendor lock-in.

The open-source notification infrastructure. In-app Inbox component, E-mail, SMS, Push and Slack Integrations.

Send push notifications to your phone or desktop using PUT/POST

A simple server for sending and receiving messages in real-time per WebSocket. (Includes a sleek web-ui)

Janus WebRTC Server

FreeSWITCH is a Software Defined Telecom Stack enabling the digital transformation from proprietary telecom switches to a versatile software implementation that runs on any commodity hardware. From a Raspberry PI to a multi-core server, FreeSWITCH can unlock the telecommunications potential of any device.

The official Asterisk Project repository.

A list of Free Software network services and web applications which can be hosted on your own servers

Fair-code workflow automation platform with native AI capabilities. Combine visual building with custom code, self-host or cloud, 400+ integrations.

Get up and running with Kimi-K2.5, GLM-5, MiniMax, DeepSeek, gpt-oss, Qwen, Gemma and other models.

User-friendly AI Interface (Supports Ollama, OpenAI API, ...)

Virtual whiteboard for sketching hand-drawn like diagrams

The Postgres development platform. Supabase gives you a dedicated Postgres database to build your web, mobile, and AI applications.

High performance self-hosted photo and video management solution.

The world’s fastest framework for building websites.

A fancy self-hosted monitoring tool

Open Source Continuous File Synchronization