Oisin McGrath

I develop software and technical projects to:

Automate and remove friction from daily tasks related to your work.
Inform non technical users and enable them to do technical tasks with a user friendly interface and assistance tools.

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Provide systems that eliminate common mistakes in your work by excluding the conditions that permit them.
Provide tools that track and organise information that matters to you, in a system convenient enough that you keep using it.
Get your equipment working when your computer doesn't support it.
Add functionality to your computer, or tooling for specific kinds of work, such as software development.
Test a business model.

Cross Market Intelligence

Is there such a thing as a good deal at the auctions? What could it be sold for privately, and how would you find out? Some say it takes years of experience. Could a computer acquire that experience? Cross Market Intelligence exists to answer these questions.

One vehicle's auction and private-sale forecasts, with the comparable private sales set out beside them and what matches or differs listed against each. — A vehicle's auction and private-sale forecasts, with the comparable private sales set out beside them — what matches, and what differs.

Read about Cross Market Intelligence →

Renault Master Camper Conversion

I built a postvan into a fully liveable home on wheels, including a kitchen, bed, heating, power, water and a toilet.

Inside the finished van looking out through the open side door and its fly screen, showing the bed, seating and sink — Looking inside through the side door.

Read about the conversion →

invoiceNow

From the job you put off every week to a few clicks that keep it off your mind for good.

Read about invoiceNow →

Receipt Manager

Could you prove you bought your vacuum cleaner, your car battery, the shoes you are wearing? How long would it take you? What if it took under a minute.

Read about Receipt Manager →

Home Screen

A browser new tab page laid out like a phone home screen — an app grid you arrange yourself, with weather, sun times and an assistant bar.

The new tab page: a grid of app tiles with real site icons over a lake wallpaper, with a search bar, clock, weather, a sunrise countdown and an Ask Claude bar. — The whole page. Tiles are placed by hand and stay put; the icons are each site's own, fetched once and cached.

Read about Home Screen →

Music

Since my school days I have had a passion for playing music, and lost track of time sitting with songs I was working on. Through the community I discovered my love for Irish music and performing for which…

Playing guitar and fiddle outdoors under a tree at the St Patrick’s Festival

Read about the music →

Community

We had a blast volunteering for the St Patrick's Festival with the South West Irish Community Group for both 2024 and 2025.

Three of us in Irish county jerseys at the festival, under the trees

Read about the community →

Tagdexer

Files organised by tags rather than folders, so one file can be in several places at once — with a permanent record of the decisions behind a project.

Cadence

Offline dictation and clipboard text-to-speech for Linux. Speak into any app, or hear selected text read aloud. Nothing leaves your machine.

Capsule

Sandboxed dev containers in one command — DevPod, rootless Podman and VSCodium — for running AI coding agents safely away from your host.

Epson RR-70W batch scanner

Driver-free batch scanning for the Epson RR-70W on Linux. Feed page after page straight to PNG or PDF — no OEM software, no cloud account.

NitroTune

Fan and thermal control for the Acer Nitro AN515-55 on Linux — a native replacement for Windows-only NitroSense.

N-of-1

Offline health tracker for Android, Linux and Windows. See what actually drives your energy, mood and focus. No account, no cloud, no subscription.

YT Downloader

A browser toolbar button for yt-dlp. Hands the current tab to a helper on your own machine, which saves the audio or video. No account and no third-party service.