Summary: Add Sᴍᴀʟʟᴄᴀᴘs formatting to your posts.
GitHub: GitHub - CambridgeDigitalBibleResearch/discourse-small-caps: Add small caps formatting to Discourse posts
Install: Follow the plugin installation guide.
Features
Put [smallcaps] tags around text and they’ll be formatted with smallcaps. There’s a toolbar button to insert these tags for you.