The last one is 30 months old, and some of the links are outdated/broken. EM's changed already, so I'm making a new one.
Competitive Games
Comp Setup Rules: How setups are determined to be playable in competitive, also has a catalogue of competitive setups inside
Refunds & Round Suspension: Information on refundable games and suspensions
Reporting
Report System: A general guideline on how to report and how rules are enforced
Note About Reporting New Players: Important note; all players should read
Appeal System: Information on appealing reports
Mod Applications
Moderator Application Guidelines: Information on applying to be a site moderator
Role Moderator Application: Information on applying to be a role moderator
Misc. Games
Disallowed Ranked Setups: Determine if a ranked setup is allowed or not
Broken Games: For broken games that need to be refunded
Vocab Words List: To help learn the dialect of EpicMafians
Guides
Eris' Guide to Internet Safety: Internet safety guide
The Competitive Guide: A guide to being successful in competitive games
Site Help
EM Tags Thread: List of tags which can be used
Mentor/Mentee Info & Sign Up Thread: Information on getting a mentor and how to sign up
EpicMafia Help Thread: Some helpful tips for anything on this site, ask any questions you have as well
Add-Ons
EpicMafia Enchancement Suite: A chrome extension that improves user experience on EpicMafia
Epicmafia Lights Out! (Dark Skin): A script to make EpicMafia darker
fufu icons: A script to make the EpicMafia role icons into fufus
Cuticons: A script to make the EpicMafia role icons into cuter ones
Saturated Icons: A script to make the icons more saturated to make them more visible
EM Autohider: A script to hide people's comments that you don't want to see.
EpicMafia Community
Pics Pls: Post your brilliant selfies
Pets Pls: Post your pet's brilliant selfies
If there are any threads I may have left out, just comment below or pm me here and I'll add them.