Passerine is an open-source, cross-platform Product Hunt desktop app built with Electron.
Stylus is a fork of Stylish that can be used to redesign the web. The objective in creating Stylus was to remove any and all analytics, and return to a more user-friendly UI. This is why we named the extension with an "us" ending, as in the actual users.
Berry is the iPhone and iPad browser that automagically makes all websites dark, blocks ads/trackers, increases battery life, and much more. Berry even includes a Today widget and dark keyboard that can be used in any app.