Helpful tutorials and threads can be found here.
Sub Forums:

Archive

New to Discovery, looking for a warm welcome? Introduce yourself here.

Forum for posting tutorials, as well as requesting and giving support to other players. Must read for all newcomers.

It is dangerous to go alone, grab a friend! Or a dozen!

Check in here for the latest news, announcements and updates from Discovery.
Sub Forums:

Development Information

The currently active server events will be displayed in this category. You can find all of the past events in the Event Archive
Sub Forums:

Uncharted Kusari,

Event Archive

A place to give us feedback or let us know of any problems you are encountering on the forums.

Role-playing stories and character biographies.
Sub Forums:

Watering Holes

A forum for inRP conversation between different groups and factions.
Sub Forums:

Official CNS Broadcasts,

Sirius News and Commerce

Sirius Crime Commision's bounty board, get your revenge here!
Sub Forums:

Blanket Bounties,

Bounty Archive,

Individual Bounties,

Bounty Board Registrations

RP Forum for Player Owned Bases. One thread per base only.

Boards for members of the official player factions of the Discovery GC RP 24/7 Server.
Sub Forums:

Official Faction Leader List,

Gallia,

Bretonia,

Kusari,

Liberty,

Rheinland,

Edge Worlds,

Inter-House,

Nomads

Forums for various unofficial player groups on the GC RP 24/7 Server

Forum for creating and reviewing factions, as well as details on specific rules relating to factions on Discovery RP 24/7
Sub Forums:

Faction Activity,

Faction Review and Feedback,

Admin Feedback Thread

Rules for playing on the server as well as discussions of rules and role-playing customs. If you need to know what ships you can fly or guns you can use, you'll find the answers here.
Sub Forums:

Official Disco Rules,

Violation Reports,

Sanctions and Warnings,

Appeals [Now Outdated]

Forum for various types of player requests
Sub Forums:

Player Requests,

Staff Applications,

Official Faction Requests,

Player Owned Bases Upgrade Requests,

Special Roleplay Requests,

Official Faction Event Requests

Forums for players buying or selling ships or equipment. This is not a roleplaying forum.
Sub Forums:

Ship Dealers,

Equipment Vendors

General talks about Discovery Freelancer RP 24/7 server.
Sub Forums:

Events & Competitions,

RP Stories Feedback Forum

General talks about Discovery mod, its content and features.
Sub Forums:

Discovery Mod Community Contribution,

Discovery Mod Development Requests,

Discovery Mod Content Submissions,

Discovery ModDB & Promotional Content,

Freelancer Modding Tutorials

Announcements and developer logs for Discovery mod development.
Sub Forums:

Discovery Unofficial Development,

Discovery Mod Bug Reports,

Discovery Mod PvP Balance,

Discovery Mod FLHook Projects

A forum for discussion of all things related to the official Discovery Wiki.
Sub Forums:

Discovery Wiki Portal

A forum for our smaller games. Also Teamspeak.
Sub Forums:

Minecraft

Free forum for any topics not related to Freelancer, such as other games and things you do when you're brave enough to go outside.
Sub Forums:

Game Debates/Reviews,

Birthday Threads,

Software & Hardware

Freelancer discussions not related to Discovery. Story, modding, singleplayer and multiplayer.
Sub Forums:

Other Discovery Servers

Talk about graphics, animation, movies, music and whatever media you can imagine.

COMPLETE AND TOTAL ANARCHY (within the scope of the rules, of course)
Sub Forums:

Spambot home,

Leaving Threads

Your one-stop shop for Livestreamers and their threads.