6 live 7 products Free to try

Software you can actually use.

Seven working products, built and maintained by one engineer. Every one of them is free to use today — no waitlist, no demo call, nothing to install.

01

The three to start with

All 7 below →

01 Live Productivity

MarkVault

A markdown workspace that reads your notes back to you

Write in plain markdown, then let the vault do the remembering: search by meaning rather than keyword, get flashcards made from your own notes, and see a map of what you actually write about. The AI runs on your device, so nothing you write leaves it.

  • On-device semantic search — no key, no upload
  • Spaced-repetition flashcards from your own notes
  • Reads your prose for commitments you forgot to write down

For anyone who takes notes and never reads them again.

MarkVault: A markdown workspace that reads your notes back to you

02 Live Developer Tools

Cairn

Background agents that open the pull request for you

Point it at a GitHub repository and hand it a task. Planner, engineering and full-stack agents split the work, run it in parallel, and come back with a pull request you can review like any other.

  • Hierarchical multi-agent planning
  • Automated PR generation
  • Open source

For developers with a backlog of small, well-defined issues.

Cairn: Background agents that open the pull request for you

03 Live Freelance Ops

DeliverVault

An AI co-pilot for client delivery work

Drafts the proposal, then watches the project against it — flagging scope creep as it happens and keeping a tamper-evident record of what was actually agreed, so the awkward conversation has evidence behind it.

  • Automated proposals
  • Live scope-creep detection
  • Consent-chain audit log

For freelancers and agencies who have lost money to scope creep.

DeliverVault: An AI co-pilot for client delivery work

No demos.
No waitlists.

Every one of these is a real thing at a real address. Click it and you are using it — there is no form in between.

See all seven
01

Free to try

All seven are free to use today. No waitlist, no demo call, no card. One has a paid plan on top; the rest are simply free.

02

Built in the open

Every one has a public repository. If you want to see how something works before you trust it, the code is right there.

03

Labelled honestly

Six are live and maintained. One is kept as a demonstration and says so. Nothing here is labelled better than it is.

02

Everything, in one list

7 products · 6 live
  • Write in plain markdown, then let the vault do the remembering: search by meaning rather than keyword, get flashcards made from your own notes, and see a map of what you actually write about. The AI runs on your device, so nothing you write leaves it.

    For anyone who takes notes and never reads them again.

    • On-device semantic search — no key, no upload
    • Spaced-repetition flashcards from your own notes
    • Reads your prose for commitments you forgot to write down
    • Works offline, installs as an app
    Platform
    Web · PWA
    Stack
    Firebase · Transformers.js · IndexedDB · Stripe
    Price
    Free tier · Pro from $5/mo
    Since
    2026
  • Point it at a GitHub repository and hand it a task. Planner, engineering and full-stack agents split the work, run it in parallel, and come back with a pull request you can review like any other.

    For developers with a backlog of small, well-defined issues.

    • Hierarchical multi-agent planning
    • Automated PR generation
    • Open source
    Platform
    Web · GitHub App
    Stack
    Python · FastAPI · React · GitHub Apps
    Price
    Open source · free
    Since
    2026
  • Drafts the proposal, then watches the project against it — flagging scope creep as it happens and keeping a tamper-evident record of what was actually agreed, so the awkward conversation has evidence behind it.

    For freelancers and agencies who have lost money to scope creep.

    • Automated proposals
    • Live scope-creep detection
    • Consent-chain audit log
    Platform
    Web
    Stack
    Auth0 · Groq · Cerebras · Stripe
    Price
    Free to try
    Since
    2026
  • Connects to a GitHub repository and scores each pull request two ways: the sentiment of the review conversation, and the estimated carbon impact of what the change actually does.

    For teams who want their review culture and footprint measured.

    GreenCode: Reads your pull requests for tone and carbon cost
    • PR sentiment analysis
    • Carbon impact estimates
    • Automated labelling
    Platform
    Web
    Stack
    MERN · Hugging Face · Pulumi ESC · GitHub API
    Price
    Free
    Since
    2025
  • Analyses patterns in what people choose and lets you interrogate the result in conversation. Falls back across models automatically, so it answers even when a provider is down.

    For anyone exploring preference data without writing queries.

    CultureSense: Taste-pattern analytics you can talk to
    • Gemini → Llama automatic fallback
    • 99.9% uptime
    • Conversational analysis
    Platform
    Web
    Stack
    Gemini Pro · Llama 3 70B · React 18 · MongoDB
    Price
    Free
    Since
    2026
  • A dashboard study: realtime visualisation, dynamic content, and a lot of attention paid to micro-interactions and accessible UI patterns.

    For a look at the front-end craft rather than a tool to adopt.

    Signal Insights: A realtime analytics dashboard, built for the interactions
    • Realtime visualisation
    • Accessible patterns
    Platform
    Web
    Stack
    React · TypeScript · D3
    Price
    Free
    Since
    2023

Freelance

Need something like these built?

I take on a small number of builds each quarter, and I do the whole thing — not a slice of it.

  • 01 Agentic AI systems Multi-agent pipelines that do real work and hand back something you can review.
  • 02 LLM applications Retrieval, evaluation and the unglamorous parts that decide whether it holds up.
  • 03 Full-stack products The whole thing — data model through to the page someone actually uses.