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.

Overseer Studio is a modern, desktop based "Digital GM Screen" designed to solve the problem of browser tab bloat and fragmented software during tabletop sessions. Developed by Tom (the creator behind Astral TableTop and dddice), it is an offline first application that allows Game Masters to consolidate all their digital tools—including VTTs, PDFs, and web browsers—into a single, infinitely customizable workspace. It is currently moving through its Early Access phase in mid 2026, positioning itself as the ultimate organizational layer for the modern "hybrid" or online GM. Description Overseer Studio is not a Virtual Tabletop; rather, it is a "tool for your tools." It provides a modular canvas where a GM can embed windows for D&D Beyond, Spotify, Obsidian, and Roll20 side by side. By using a system of "tiles," GMs can create custom layouts that fit their specific workflow, switching between different "screens" with keyboard shortcuts. Because it is a local desktop application that requires no subscription or internet connection to run, it offers a level of stability and privacy that cloud based alternatives cannot match. System Overview & Key Features Infinite Modular Canvas The core of Overseer is an infinite workspace where you can place "tiles." These tiles can contain anything from a simple notepad or a PDF viewer to a fully functional web browser. You can resize, group, and tab these tiles together to create the perfect command center for your specific campaign. VTT and Tool Embedding Overseer is designed to play well with others. You can natively embed Foundry VTT, Roll20, or Owlbear Rodeo directly into your screen. This allows you to manage your map and tokens in one tile while keeping your campaign notes and creature stat blocks visible in another, eliminating the need to Alt-Tab between programs. Offline First Architecture The application runs entirely on your hardware (Windows, macOS, or Linux). This ensures that your game is never interrupted by server outages or slow internet speeds. Your data remains on your machine, giving you total ownership over your preparation materials. Pop-out Player Sharing While the software is for the GM, you can "pop out" any tile—such as a map, a piece of concept art, or a video—into a separate window. This window can then be shared via Discord or Zoom, or cast to a physical TV for in-person groups, allowing you to control exactly what the players see. Extensible Plugin SDK For power users, Overseer features a robust SDK. Extensions are built using standard web technologies (HTML/JS), allowing the community to create custom dice rollers, soundboards, or automation tools that can "talk" to each other across different tiles within the session. One Time Purchase Model In a market dominated by monthly fees, Overseer Studio is a "buy once, own forever" product. There are no account requirements or hidden subscriptions, and all future updates are included in the initial purchase price, making it a highly cost effective solution for long term GMs. Additional links overseer.studio - Official Overseer Studio website discord.gg - Official Discord for beta testing and development updates

VVD is a visually driven world-building and campaign management platform launched in 2024. Created by an independent developer, it positions itself as a streamlined, "distraction-free" alternative to complex wikis like World Anvil. In 2025, the platform gained massive popularity on social media for its "clean UI" and its strict No-AI pledge, promising that all art and assets on the platform are created by human artists.  Description VVD is built for the "sparks of inspiration." It uses a card-based system to organize NPCs, locations, and magic items, allowing users to connect them visually through an interactive graph. Unlike traditional folder-heavy organizers, VVD feels like a digital corkboard or a personalized Wikipedia that prioritizes aesthetics and ease of use. It is a web-based tool, meaning it requires an internet connection, but it is highly optimized for mobile devices, making it a favorite for GMs who need to jot down world-building notes on the go.

enCounter is a free, open-source encounter and initiative manager designed for tabletop RPG game masters. It provides a dedicated DM Console for preparing and running encounters, along with a separate Player Display that can be shown on a second monitor, television, or gaming-table screen. Game masters can track initiative, rounds, hit points, combat status, conditions, resources, hidden enemies, and other encounter information while controlling exactly what players can see. enCounter also supports reusable character and creature libraries, Saved Encounters, Scene and Combat presentation modes, visual countdown timers, encounter backgrounds, portraits, and local Soundscapes with music, ambience, and prepared sound cues. The Player Display can switch between STAND BY, Scene, and Combat modes, allowing it to be used before and during combat. During initiative, the active visible combatant is automatically centered for players, while the DM Console can follow the current turn without interrupting other encounter edits. enCounter supports multiple tabletop RPG system profiles as well as generic TTRPG play. It runs locally on the user's computer, supports Windows and Linux portable releases, and includes local backup, export, and import tools. The project is currently in Alpha and is actively being developed based on real tabletop use and community feedback. enCounter is released under the MIT License and is available free of charge.

R3TCON is a local-first canon and continuity system for writers, worldbuilders, TTRPG creators and narrative game developers. It helps creators manage characters, places, events, relationships, timelines, knowledge and world state as a setting grows, then checks those records for contradictions. R3TCON can flag issues such as impossible journeys, conflicting dates or events, characters appearing after their established death, or characters knowing information they have not yet learned. It does not use generative AI to write or rewrite a creator’s world. Instead, it shows what conflicts, why it conflicts and which established canon is involved, leaving the final decision with the creator. Existing material can also be imported, allowing established campaigns and worlds to be brought into R3TCON without rebuilding everything from scratch. R3TCON is local-first and designed around creator ownership, portable world files and deterministic continuity checking.

A new kind of toolkit for any RPG and GM. Import a rulebook or build your own RPG, and RPGadget fills every tool for you. NPCs and monsters arrive with full stats and lore. Adventures become flowchart storyboards. Players make their characters on their phones before the session starts. Everything you need is in one place, so you can focus on your players instead of hunting for page numbers.

dmcal is session scheduling for tabletop campaigns. Players mark when they're free once; the DM sees the nights that work, schedules the session, and everyone answers from the email with one tap.

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.