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Day 1 - Taverns Generator at Here be Taverns
There are many tavern generators, but what distinguishes the Taverns at Here Be Taverns is the layout map and then just the crucial details of Name, Menu, Rumours, and NPCs.
Day 2 - RPG Story Constructor e Taverns
System neutral, the RPG Story Constructor has images with text prompts, with ability to lock dice/images.
And it comes in flavours of fantasy, modern, scifi, horror plus mix and match. And a character mode to get ideas.
Day 3 - Vintage Star System Map Generator
Over at Itch Arkimedz has a Vintage Starmap Tool ,which falls more into the "cool" category than the particularly useful one.
Can be downloaded as a png image and the star system name can be set in settings.
Day 4 - Fantasy Calendar
Fantasy Calendar is a tool integrating months, events (such as Pie Week), moons, seasons, weather and location. There are preset calendars (the Warhammer Fantasy Imperial one is shown) including Middle Earth, D&D worlds, the Critical Role world, Golarion and a few others).
You can also randomly generate (or simply build) your own calendar. The other random element is weather, and I should really try it out for solo play sometime!
Day 5 - One Page Dungeon from Watabou
So picking one tool for the prolific watabou, went with One Page Dungeon hosted at itch. A fantasy dungeon with a few notes, helpful for prep or a one shot or solo.
Day 6 - GM's Apprentice Web Tool
Day 7- NPC Generator at Glumdark
The NPC Generator at Glumdark has a grimdark style for the NPC Portrait and extra information. They have basic stats available for 5e (or any version of D&D really) or MÖRK BORG.
There's a nice amount of information, but not overwhelming amount. And anything with a red bar under it can be rerolled.
Plus the site has a wide array of other grimdark generators for fantasy, cyberpunk and space.
Day 8 - Culture Generator at Iron Arachne
The Culture Generator at Iron Arachne is a procedural generator with a fantasy culture, around which are built names for characters and places, taboos religion, food, music and details on greetings and organisation.
Day 9 - Azgaar's Fantasy Map Generator
The amazing Azgaar's Fantasy Map Generator is a world building tool with many ways to configure it. (Options - Heightmap has an important one!)
Day 10 - Location Generator at OMGM
The Location Generator at OMGM is good for encounter locations, a waypoint for solo journey or a hex for a hexcrawl. Other generators there are also worth checking out.
Area can be set in settings, and has details of secrets, weather and inhabitants (using 5e creatures)
Day 11 - Ironsworn Starting Setup at Chartopia
Ironsworn is a popular solo rpg (because it's great, and free!) and at Chartopia is an Ironsworn - Semi-Random Campaign Setup tool.
Chartopia is a tool where anyone can create rollable charts and random generators, including a whole Collection of Ironsworn Play Aids.
The Vampire 5e Character Generator is another example of a tool at Chartopia.
Day 12 - 7Tools Settlement Generator
The Settlement Generator at 7Tools does a lot of work, creating an interactive map, descriptions, events, shops, residences and npcs. Most of these can be expanded by clicking on the name / link.
There are also many other rpg generators at 7Tools.
Day 13 - My Campaign Generator at Donjon
Donjon is a well known rpg generator site, and My Campaign is one filled in worksheet with generated items. (worksheet is based on pdf by Matt Colville)
There are many tools to check for fantasy, D&D, pathfinder, alien, sci-fi and others. The World Generator and Town Generator have been covered here before. And also well known for the dungeon maps in various guises.
Day 14 - DNGNGEN - A Gothic Dungeon Gen
Meant for Mork Borg, DNGNGEN work for any dark fantasy dungeon. It is also an example of superb design, style and content packaged into one tool
Day 15 - Gozzy's Wilderness Map Generator
Gozzy's Wilderness Map Generator creates battlemaps, with options for a bridge, ruin, road or clearing. Options for large / medium size and grid type. A few more generator options would be great.
It has companion generators for Dungeon Maps and Cave Maps.
Day 16 - Pet Generator at RanGen
The Pet Generator at RanGen is a personal favourite, with options including parrots, lizards and horses as well as cats and dogs.
RanGen has a lot of different generators to most sites, as it is focused more on tools for writing (and narrative) than rpgs.
Day 17 - Hex Roll, Sandbox Tool
Hex Roll 2nd Edition is out and rolling customisable sandboxes of a hexmap with regions, cities, encounters, dungeons and NPCs.
Choose a template, modify terrain. Every hex has something of interest
Day 18 - 5E Magic Shop
An example of a very specific generator (for a particular game), 5E Magic Shop Generator has lots of customisation.
As well as village / town / large city there's the General Store. And in advanced options you can choose all type of magical and mundane types of items to return in shops.
Day 19 - Spaceship Generator at Role Generator
Choosing the Random Spaceship Generator at Role Generator was hard, because there are so many impressive tools on the site.
The spaceship can be chosen from six types, and comes with basic info such as name, type, engine, and a ship map (sometimes multi-level). Then it also includes descriptions of ship, crew, engine, armaments and further information.
Day 20 - Auto Roll Tables
Auto Roll Tables has lots of things to generate in one place, each pulling from several random tables to such as the Merchant Caravan above. Choose from dungeons, factions, plots, magic wilderness tabs and then the many options within each of these (just found Magical Mishaps!)
Also it's on gihub, so you can fork it for your own needs. Not sure how mobile friendly the site is
Day 21 - House Map Generator at Kassoon
Over at Kassoon the House Map Generator includes options for houses, cottages, taverns and shops. Plu.s an editor to modify the maps in.
There are many other great map and non-map generators at Kassoon, including settlements, npcs and characters.
Day 22 - Random Character Miniature at Anvl
At Anvl is a Miniature Generator with a "Generate a random character" button, which will build up all the elements of the miniature in layers.
You can also customise them, with base models for humans, orcs, skeletons, elves, tieflings, frog-people, eagle-people and more. Or mount them on a horse, bear, throne or wheelchair.
Day 23 - RPG Solo - Oracles and Gens
RPG Solo has an old school interface, and is meant for solo play with buttons for rolling dice, generators for quests / npcs / places and support for Mythic GM Emulator, UNE (Universal NPC Emulator) and ability to define your own lists
Day 24 - CPF GM Tools, Fantasy and Sci-Fi Text Gen
CFP GM Tools has textual generators for fantasy and sci-fi, covering places, stories, items and effects. It used to be called Ancient Quests
Day 25 - Fantasy Town Generator
The Fantasy Town Generator creates a decent map with lots of generation options (size, forest, walled). But the magic is in the details, generating each building and NPC based in them, with a searchable list. And the details can be saved and edited.
If you choose a building, it will tell you who is there and which room they are in for a particular time (which can be changed).
At 18:00 in the Fool and Dress, an inn, there were 6 people at the bar, a fiddler on the stage, a cook in the kitchen, 13 people sat at tables and no-one in the private rooms. All NPCs with details and relations and a schedule!
Day 26 - Random Job Board Posting at Darehart
Darehart has a Random Job Board Posting Generator, and the notes can be dragged around.
Day 27 - What's Your Favourite RPG Generator Tool?
Instead of a link to a tool, today is asking what is your favourite RPG Generator Tool?
The text generator you use most often
The image generator that keeps you fascinated
The solo tool that creates surprises and twists for you
The mapping tool that you to put things in front of your players
What is your favourite RPG Generator Tool?
Day 28 - Sectors Without Number
Sectors Without Number will generator a star sector, with some configuration available. It's for Stars Without Number but should be useful for many sci-fi games. It has details of systems and what you will find there.
Day 29 - Potion Shop at Magical Gurll!
The Potion Shop at Magical Gurrl is system-neutral and gives enough information to make it unique, including who runs it, other customers and possible security.
Day 30 - NPC Generator
NPC Generator has detailed characters using D&D stats and has lots of filter for what type you want.
Day 31 - Mapgen4 at Red Blob Games
While not truly a random generator, MapGen4 at Red Blog Games lets you sculpt an island by selecting Ocean / Water / Valley and Mountain and drawing them on.
I live in hope that someone one day creates a fantasy map generator based on this, where you can add in desert, forest, mountains, sea etc by painting on your modifications, which adapt rivers, settlements, foliage as you do so!