I often use pkgstats to check the popularity of Arch packages I use. Sometimes I notice a package is declining in popularity, and I’d like to find similar alternatives that are trending instead. Something like https://pkgstats.archlinux.de/fun
Are there any sites that categorize Linux software and show popularity within each category, so it’s easier to discover alternatives?
Repology might kinda help for your use case. It lets you search for software that is packaged on many different “families” of distributions. You can also filter by category.
Admittedly it does kinda depends on your definition of popularity. But it’s good at answering these questions: