Here you will find a list of handy resources to assist you in designing your own roleplaying campaigns.

1,000 NPC Traits

Exactly what the title says. My NPCs can sometimes get repetitive in the personality department. This tool solves that.

5e SRD

Official Open Game Content rules for 5th Edition AND the best Open Game Content from other publishers.

AideDD

This is a great index for many 5e resources. I mainly use it for the monster index.

Chaotic Shiny - Writing and RPG-Related Generators

Chaotic Shiny is a generator site aimed at people who write, game, or live in fantasy worlds of their own creation. TONS of cool generators here.

donjon

Tons of random generators.

Dungeons Masters Guild

Dungeon Masters Guild is part of a family of premiere online marketplaces also including DriveThruRPG, Dungeon Masters Guild, DriveThruCards, DriveThruComics, DriveThruFiction, and Wargame Vault.

Fake Word Generator

Need some fake words for a spell or language? This is the site for you!

Fantasy name generators

My favorite name generator site. There are over 1300 name generators, as well as many description generators, guides and various tools you might find helpful.

D&D 5th Edition Random Encounter Generator - Goblinist

I find this site to be invaluable when designing my home brew adventures.


Kassoon

One of my favorite all around sites. You could design an entire campaign without leaving this site.

Mithril and Mages

Some good name generators here. My favorite is the Old West name generator. Many old west names fit surprisingly well in a fantasy setting.

Print & Play Admagic

Print & Play Admagic provides quality printing, timely processing and excellent customer support, encouraging gamers everywhere to turn their ideas into reality. I've used their services a few times and have always been happy with the results.

RANDOM.ORG

My favorite random number generator. You can also generate coin flips, card draws, and many others.

Roll20

I love this site for making maps. Roll20 brings pen-and-paper gameplay right to your browser with a rich set of features that save you time and enhance your favorite parts of tabletop games.

Star Wars 5e

A full conversion for Dungeons and Dragon Fifth Edition to the Star Wars universe.


Tricks, Empty Rooms, & Basic Trap Design

This is an old school AD&D resource, but there is a lot of good stuff that can be easily converted to 5e.