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express-ipc
A simple IPC server with express-like request and route handling that also supports broadcasting to multiple channels.
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mermaid
Generation of diagrams like flowcharts or sequence diagrams from text in a similar manner as markdown
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SurveyJS
Open-Source JSON Form Builder to Create Dynamic Forms Right in Your App. With SurveyJS form UI libraries, you can build and style forms in a fully-integrated drag & drop form builder, render them in your JS app, and store form submission data in any backend, inc. PHP, ASP.NET Core, and Node.js.
See it on GitHub and NPM.
Sorry, it's too big to fit here and Dev.to doesn't support SVG files. I tried to embed the flowchart here but it seems like, Dev.to neither supports Mermaid nor can load my GitHub gist about the flowchart. See the full chart here.