Tools & Platforms

Codex Cryptica is an AI-assisted worldbuilding and campaign management tool built around a living knowledge graph instead of a folder of loose documents. Every character, faction, location, and event you create becomes a linked entity, so your world stays connected and explorable as it grows. Genre-agnostic across fantasy, sci-fi, cyberpunk, horror, post-apocalyptic, western, steampunk, and more.

A monster stat block builder for the 5th edition of Dungeons and Dragons.  Quickly create stat blocks by filling in a form, rather than typesetting everything by hand.

Item Forge is a small free tool to help GMs to create printable item cards for their table. It is optimized for D&D and Shadowdark. You can quickly fill out the form and it will generate a nice card design. There are predefined templates in D&D, Shadowdark and printer friendly style. You can also use the custom template where you can design it with CSS yourself. There are various export options, from PDF to images and a backup as json. For quick sharing there is a publish option which gets you a link that you can share with other GMs. Item Forge is translated into 10 languages currently and keeps growing.

An assortment of online tools for TTRPG'ers. • online dice roller. • online character generator. • online NPC generator. • online loot generator. • online encounter generator. • online grid paper printer.

Session Forge is an offline game master toolkit for fantasy tabletop RPGs, made by Donald Stelling of Digital Underground. Instead of another long PDF, it is a single HTML hub that the GM opens in a web browser and uses at the table to prepare and run sessions. It holds 14 tools: encounters, NPCs, loot, initiative, session notes, dungeons, taverns, quests, rumors, villains, weather and travel, settlements, a one-click one-shot outline, and a short GM playbook. Tools for running the table - Encounter Forge builds fights on an XP budget set by party level, party size and difficulty (Easy to Deadly). Each encounter comes with a motive and a twist, and the creatures are drawn from 198 original 5e-style stat lines. - Initiative Tracker handles HP, AC, conditions, group adds and d20 rolls. Rounds and turn order save automatically, so combat survives closing the browser. Fights made in Encounter Forge can be sent straight into the tracker. - Session Notes saves as the GM types, offers random sparks for quick ideas, and keeps a full archive that can be restored. - GM Playbook explains how to use the tools live without slowing the game down. Generators - Full Session: a one-click one-shot outline with a hook, NPCs, a villain, a journey, two fights, a site, treasure and a twist. - NPC Generator: 8 naming cultures, plus role, voice, quirk, secret and adventure hook, and a "crowd of six" mode. - Loot Tables: common to very rare items, plus gems, art objects and 64 curses. - Taverns & Shops: taverns and shops with priced wares. - Dungeon Builder: dungeons of 3 to 12 rooms, with a boss scaled to the party. - Quest Hooks, Villain Forge and Settlements. - Rumor Mill: rumors with a GM-only truth rating. - Weather & Travel: 6 climates and 4 seasons. On every generator, the GM can lock a line and reroll the rest, go back through a saved history of the last 20 rolls, copy results as text or Markdown, download them as .md or .txt, and send them to Session Notes in one click. Seeds are repeatable, so the same seed always gives the same result. How it works The GM downloads a ZIP, opens index.html and bookmarks it for game night. After that one download, Session Forge runs fully offline with no account. Data is saved in the browser, and the home page has backup and restore. It works in a browser on desktop and on mobile. Systems and fit The stats are 5e-flavored so they feel familiar, and the content is easy to reskin for OSR games, Pathfinder or homebrew settings. All generator content is original; it is not a dump of official rulebook text. Session Forge suits GMs running 5e-compatible fantasy, one-shots and west-marches campaigns, and GMs who improvise and need ideas fast. It is not a virtual tabletop plugin: it runs locally in the browser and does not connect to Foundry VTT or Roll20. Price and license Session Forge is a one-time purchase from CAD$14.99 (pay what you want above that) on Gumroad. The license is personal, single-GM use. Version 2 raised the toolkit from 6 tools to 14, and earlier buyers get v2 free by downloading again; their v1 saves carry over.