Apps

Software anyone can install — editor extensions, browser tooling and developer utilities, at 9,787 installs served across every marketplace they ship on.

Figures verified 2026-09-02, read from each marketplace.

DontTrustVerify — live fact-checking for Chrome

A Chrome side panel that fact-checks what you hear — live. It transcribes the conversation, pulls out the claims that matter, and checks each against real sources, marking "insufficient evidence" when the web has nothing to show.

Impact — A personal experiment grown into a publishable tool: fact-checking runs on your own Gemini key against your own Google Cloud project, and the publisher collects nothing. Live on the Chrome Web Store.

ToolsGeminiGemini NanoTypeScript

FrameworksChrome Manifest V3Web Speech API

Updated 2026-08-31

Chrome Web Store ↗0 usersOverview & privacy ↗

Exam Cert Prep

An exam-prep platform, powered by Gemini: a vast bank of practice questions tuned to the exact objectives of your certification — Google Cloud and Anthropic today, more vendors coming. Pass the bank, pass the exam — or your money back. (It's free.)

Impact — The bank refreshes every month as each exam's objectives, case studies and question types shift, and tracks your readiness objective by objective — so you know when you're ready. In private preview. Not affiliated with the certification providers, and the catalogue does not reproduce live exam content.

ToolsPythonFlaskSQLiteGemini

FrameworksGoogle ADKCloud Run

Updated 2026-08-21

Private preview

examcertprep.com ↗

c4x — C4 Diagrams for VS Code

Generates C4-model architecture diagrams from a codebase and refines them in a visual editor, directly inside the IDE. Gemini drafts the model from the code; a drag-and-drop editor tunes the layout, elements and relationships; and the diagram stays as text in the repo, reviewable in pull requests.

Impact — 8,007 installs across the VS Code Marketplace and Open VSX, and shipped in Google's Antigravity IDE. The v1.6 Visual C4 Editor lets you drag the Gemini-generated model into shape while it stays diffable text in the repo.

ToolsGemini 3TypeScriptVS Code Extension API

FrameworksAntigravityNode.js

Updated 2026-08-06

Open VSX ↗6,438 downloads5.0★VS Code Marketplace ↗1,569 installs4.5★Source ↗Write-up on Medium ↗

PromptKeeper

A Chrome extension for managing GenAI prompts — one place to keep, organise, and reuse the prompts that actually work.

Impact — 252 users on the Chrome Web Store. Rebuilt on Chrome's built-in on-device AI, so the prompt library never leaves the machine.

ToolsJavaScriptChrome Built-in AIChrome Extension API

FrameworksWeb Extensions

Updated 2026-02-23

Chrome Web Store ↗252 users4.5★Write-up on Medium ↗Original write-up on ITNEXT ↗

Simple Focus Mode

A Chrome extension that breaks meetings and deep work into focused intervals.

Impact — 56 users. The first extension published under this name, and the start of a build-in-public habit that now runs to editor tooling and agents.

ToolsJavaScriptChrome Extension API

FrameworksWeb Extensions

Updated 2026-01-03

Chrome Web Store ↗56 users5.0★Write-up on Medium ↗

Pine Script v6 Language Support

Unofficial Pine Script v6 language support for VS Code — IntelliSense, hover documentation, and real-time validation.

Impact — 1,472 installs. Pine Script shipped without editor tooling; this covers the whole of v6 — syntax, completion, diagnostics.

ToolsTypeScriptVS Code Extension API

FrameworksLanguage Server Protocol

Updated 2025-10-07

VS Code Marketplace ↗1,472 installs

Ghostwriter

Turns accumulated notes and thinking into a structured, defensible argument that still sounds like the person who wrote them.

Impact — Early preview — designed and architected, not yet open. Nothing to install and no sign-up.

ToolsPython

FrameworksGoogle ADK

Updated 2026-08-16

Early preview