Top.gg is the OG Discord directory. It has the most comprehensive list of Discord bots, and a very active community. The site goes down once in a while hence only 4/5 stars.
Best Website Ever, You Can Submit Your Programmed Bots For Free And Invite Most Upvoted/Popular Bots In The Most Easiest Way, You Can Also Submit Your Own Server(s) For Free Too
Has benefited my bot and community greatly! Submitting my bot was straightforward and with a custom HTML description it was easy to make my bot page look great
My experience overall was pretty good. They have built a strong community and the site itself is easy-to-use and errors get fixed in a good manner of time.