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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.
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bubbly
Discontinued Bubbly is an open-source platform that gives you confidence in your continuous release process.
WhiteSource Renovate is open source licensed under AGPLv3.
Depends if you are interested in both the license and security side of things. There are tools like ORT (https://github.com/oss-review-toolkit/ort) that are quite powerful but have a little learning curve. I also know about initiatives like OpenChain and Double Open (https://github.com/doubleopen-project/doubleopen-publications/blob/master/publication.md#double-open-landscape-survey) that have information available.
LG also recently open sourced their tooling for this: https://fosslight.org/
I am also involved in a very early OSS project helping to wrap some of these things together, but we don’t have any documentation on it yet but can provide more details if interested - we are currently doing a major refactor and build for a new version with this as one of our core use cases: https://github.com/valocode/bubbly