Software

Fast and beautiful API request builder. ([Source Code](https://github.com/hoppscotch/hoppscotch))

Microservice API Gateway and Platform. ([Source Code](https://github.com/Kong/kong))

High-performance API Gateway. ([Source Code](https://github.com/luraproject/lura))

Flexible and modular backend framework/server for object persistence, API development and authentication. ([Source Code](https://github.com/erudika/para))

Open-source webhooks as a service that makes it super easy for API providers to send webhooks. ([Source Code](https://github.com/svix/svix-webhooks))

Fast and scalable open source API Gateway. Out of the box, Tyk offers an API Management Platform with an API Gateway, API Analytics, Developer Portal and API Management Dashboard. ([Source Code](https://github.com/TykTechnologies/tyk))

Yaade is an open-source, self-hosted, collaborative API development environment. ([Source Code](https://github.com/EsperoTech/yaade))

Enterprise-grade feature flag platform that you can self-host. ([Source Code](https://github.com/featbit/featbit))

Dashboard, API and SDKs for adding Feature Flags to your applications (alternative to LaunchDarkly). ([Source Code](https://github.com/flagsmith/flagsmith))

Feature flag solution with support for multiple data backends (alternative to LaunchDarkly). ([Source Code](https://github.com/flipt-io/flipt))

Simple, complete, and lightweight feature flag solution (alternative to LaunchDarkly). ([Source Code](https://github.com/thomaspoignant/go-feature-flag))

Web-based IDE framework with a small footprint and minimal requirements, continued from Codiad. ([Source Code](https://github.com/Atheos/Atheos))

VS Code in the browser, hosted on a remote server

Remote development machines on your own infrastructure. ([Source Code](https://github.com/coder/coder))

Open source workspace server and cloud IDE. ([Source Code](https://github.com/eclipse-che/che))

API to compile and run source code. ([Source Code](https://github.com/judge0/judge0))

Web-based environment for interactive and reproducible computing. ([Demo](https://mybinder.org/v2/gh/jupyterlab/jupyterlab-demo/try.jupyter.org?urlpath=lab), [Source Code](https://github.com/jupyterlab/jupyterlab/))

LLM engineering platform for model tracing, prompt management, and application evaluation. Langfuse helps teams collaboratively debug, analyze, and iterate on their LLM applications such as chatbots or AI agents. ([Demo](https://langfuse.com/docs/demo), [Source Code](https://github.com/langfuse/langfuse), [Clients](https://langfuse.com/docs/integrations/overview))

Build internal tools, BI dashboards, admin panels, CRUD apps and workflows in minutes using YAML / JSON on an self-hosted, open-source platform. Connect to your data sources, host via Serverless, Netlify or Docker. ([Source Code](https://github.com/lowdefy/lowdefy))

Lightweight platform for building webhooks, scheduled tasks and pages. Implement your logic with Bash or Lua. ([Source Code](https://github.com/rapidforge-io/rapidforge))

Web browser based IDE for R. ([Source Code](https://github.com/rstudio/rstudio))

Developer-oriented translation tool. ([Source Code](https://github.com/mirego/accent))

Developer & translator friendly web-based localization platform enabling users to translate directly in the app they develop. ([Source Code](https://github.com/tolgee/tolgee-platform))

Translation management platform for teams. ([Source Code](https://github.com/ever-co/ever-traduora))