The RepoScope website at
https://reposcope.com/ was suggested to me by the Manjaro Twitter account at
https://twitter.com/manjarolinux.
I am not sure if I am last in line on this, however I thought that I would share this with everyone. It looks to have been put together by an independent developer, I am not sure.
I really like the applications page sorted alphabetically. You can search packages, files and man pages. You can see what repositories are being tracked on the front page.
Let me know what you think.