Add functionality to your Discourse with these Official plugins that I recommend:
- Spoiler Alert Hides text until clicked
- Solved Users can accept solutions in designated categories
- Data Explorer Make SQL queries against your database, for up-to-the-minute stats!
- Canned Replies create and save replies for repeated use
- Cakeday! Show a birthday cake emoji beside your name when it is your birthday!
- Advertising Plugin Include Adsense, DoubleClick, and Amazon ads in your Discourse.
- Patreon Plugin Let your community pay for access and/or badges.
This is a list of Official plugins that seem unlikely to cause trouble. I can install other plugins as well.