nodebb-plugin-post-geolocation(latest: 1.1.0) This plugin exposes a little icon next to a post's timestamp that, when clicked, opens a modal showing where in the world the post was made.
nodebb-plugin-superusers(latest: 1.0.2) Allows you to set a certain group of members to be superusers
nodebb-plugin-pushbullet(latest: 4.2.0) Allows NodeBB to interface with the Pushbullet service in order to provide push notifications to user mobile phones
nodebb-plugin-dwnvtr(latest: 0.1.2) NodeBB plugin to add interesting effects to downvoted posts and/or users with negative reputation (trolls)
nodebb-plugin-adsense(latest: 1.0.5) Plugin to easily place ads on your forum in different areas
nodebb-plugin-iframely(latest: 0.7.14) Iframely will give you embeds from over 1700 domains, plus previews for the rest of the web.
nodebb-plugin-tarsnap(latest: 1.2.8) This is a Tarsnap plugin for NodeBB. Keep in mind it is merely an interface, and **you still have to figure out how to install Tarsnap on your server** before this plugin is of any use.
nodebb-plugin-blacklist-country(latest: 1.1.3) This plugin allows administrators to ban entire countries from registering and logging in. Please be aware that this is a heavy-handed approach and should not be used lightly (or temporarily)!
nodebb-plugin-audio-embed(latest: 1.1.7) This plugin allows users to upload audio files (mp3 files, specifically) and embed them into posts.
nodebb-plugin-solr(latest: 5.2.9) Full-text searching for NodeBB using Apache Solr
nodebb-plugin-tenor-gif(latest: 1.2.5) 
nodebb-plugin-email-helper(latest: 0.0.6) This plugin helps you test your email templates without going through an emailer plugin (or sending real emails).
nodebb-plugin-imagemagick(latest: 2.1.1) This plugin replaces image parsing functionality built into NodeBB with ImageMagick, running on the host machine.
nodebb-plugin-mentions(latest: 2.13.6) NodeBB Plugin that allows users to mention other users by prepending an '@' sign to their username
nodebb-plugin-knowledge-base(latest: 1.1.0) This plugin exposes a new category-level privilege called "Knowledge Base". When enabled for a specific category, all top level posts in that category will become editable by other users.
nodebb-plugin-2factor(latest: 2.9.1) In addition to regular authentication via username/password or SSO, a second layer of security can be configured, permitting access only if a time-based one-time password is supplied, typically generated/stored on a mobile device.
nodebb-plugin-question-and-answer(latest: 0.8.5) A nodebb-plugin-question-and-answer plugin for NodeBB which allows users to post topics as questions and select a post as the answer
solr-client(latest: 0.8.0) A Solr client library for indexing, adding, deleting, committing, optimizing and searching documents within an Apache Solr installation (version>=3.2)