Glue42 Core - The world's first open-source web app integration platform

Glue42 Core exposes a rich set of interoperability methods enabling web applications to seamlessly communicate with each other. All interaction occurs on the client device, making it secure and performant. It was built to allow users simplify their workflows and reduce errors while working with various applications at the same time. In addition to the standard JS API, Glue42 Core exposes framework specific bindings for the most popular web frameworks, making the integration in your existing codebase a breeze.

Glue42 Core in entirely open source integration platform, it needs Zero-installation delivery and it provides it's users a native app-like experience. The great thing about Glue42 Core is that it can be used in production environments at no-cost.

I have been using it for a couple of demo apps and it works as a charm! Easy interoperability with no installation.