Updated Apps – https://flathub.org/en/apps/collection/recently-updated/
Popular Apps – https://flathub.org/en/apps/collection/popular/
Productivity – https://flathub.org/en/apps/category/office/
Graphics & Photo – https://flathub.org/en/apps/category/graphics
Audio & Video – https://flathub.org/en/apps/category/audiovideo/