All open source and side projects
Octopus
Octopus replaced a paper-and-fax process that had survived since 1955. It started as a single warranty manager on a Raspberry Pi and is now the system the whole shop depends on. The interesting part was never the CRUD — it was getting people who'd trusted a notebook for decades to trust a screen, by making the software genuinely less work than the paper it replaced. The full story is in the case study.

Burning the Notebook
How I took Battery Wholesale — my family's battery shop, running on pen and paper since 1955 — and built the software it runs on today.
4 min read
Read the write-up