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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.
I actually have a list of hundreds of free (and some paid) resources. You can find it on GitHub.
You should add flashpoint to your write up. It's a client, but it's an excellent effort to archive flash games, animations, and such.
I used Open Office as a free alternative to Microsoft Office. I now have a free copy of Office as my friend had spare licences. Definitely helped me when I needed to update my c.v when unemployed. https://www.openoffice.org/