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gnome-colorblind-filters
A GNOME Shell extension that offers full-screen color filters that should help color-blind users and developers.
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custom-hot-corners-extended
A GNOME Shell Extension that allows you to give a function to any corner or edge of your monitors and expand your keyboard capabilities.
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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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kwin-effect-shaders_shaders
Discontinued The GLSL shaders for https://github.com/kevinlekiller/kwin-effect-shaders
Colorblind Filters extension is available on extension.gnome.org and GitHub.
Updated filters are also available as actions in Custom Hot Corners - Extended extension, where they apply on the currently focused window, instead of the whole desktop.