AI is moving fast. I try out new developments in practice and learn by doing. The result is small, practical things: tools, guides, games and calendars. Calmly designed: black and white with red accents, without noise. First for my own use. Then to share.
20
01
2026
A calculator for the Dutch income tax return. Amounts and settings stay in the app. It started as a simple base, grew into a fuller calculator, and it keeps improving.
Work in progress. Not a substitute for filing with the Dutch Tax Administration.
02
2026
Importing a car from Germany yourself: the costs and a full step-by-step plan. BPM, the RDW, transport and number plates, mapped out in advance. Paste an AutoScout or Kleinanzeigen link, or enter the car yourself.
An estimate, not a filing. Rates change. Check the figures yourself.
03
2026
A practical guide to importing a car from Germany. Steps, costs, BPM, VAT and the RDW.
An overview, not tax or import advice.
04
2026
How the Dutch car tax BPM came about, why it stayed, how to calculate it in 2026, and how the Netherlands compares with other countries.
An explanation, not tax advice.
05
2026
A PDF for consumers in the Netherlands. What to do when a parcel is marked delivered but never arrived. With a clear explanation and email templates.
Practical help, not legal advice.
06
2026
A minimalist search engine. One field, a white page. Helder is a quiet place to search.
A search page of my own, not a replacement for a large search engine.
07
2026
A step-by-step plan, checklist and emails for emigrating from the Netherlands. Choose a destination. Tasks and emails follow the country. The details stay in the browser.
Practical help, not emigration or tax advice.
08
2026
Step by step, from the decision to the first year. File, six phases, money, tax, healthcare and letters to authorities.
A map alongside the app. Not emigration or tax advice.
09
2026
The August 2023 fiscal measures list. For each point, whether it has since been introduced, partly introduced, or not yet, as of 6 October 2026.
126 points. Six introduced, twenty in part, five proposed.
10
2026
A five-minute explainer video on the Dutch box 3 wealth tax in 2027: what changes compared with 2026, what is already law and what is still only a proposal.
As of 7 October 2026. An explanation, not tax advice.
11
2026
A browser game of my own, based on the 1981 arcade game Donkey Kong. Climb girders and ladders with Bouwer, jump over rolling barrels and smash them with the hammer.
Two versions: Bonk! I in arcade style, Bonk! II as a dual-screen handheld. Works on mobile too.
12
2026
A browser game of my own, based on the 1978 arcade game Space Invaders. Shoot down the advancing aliens before they reach the ground, and take cover behind the bunkers.
Works on mobile too.
13
2026
A pinball machine of my own for the browser, with a building-site theme. Launch the ball, hit the bumpers and targets, and keep it in play with the flippers.
Two versions: Flipper! I with the building site, Flipper! II with a third flipper, a crane ramp, missions and multiball. Works on mobile too.
14
2026
Live dashboard for foil-assist spots along the European coast, from Denmark to Morocco and the Canary Islands: waves, wind, current, tide, star ratings and spot cams.
An indication only; always judge conditions yourself on site.
15
2026
Factual overview of the new Tesla Roadster, unveiled on 15 October 2026: specifications, three generations, prices, FSD and timeline.
Explainer as a PDF.
16
2026
Reusable template in the style of the Roadster dossier: one JSON file becomes a PDF with cover, key figures, labels, tables and sources. Dutch and English.
Manual, blank example and zip.
17
2026
Guide to Ferrari Hypersail, Maranello’s first sailing yacht: a 100-foot full-foiling monohull. Design, foils, energy, build, team and videos.
PDF guide (Dutch), 18 pages.
18
2026
Reusable template in the style of the Hypersail guide: one JSON file becomes an editorial PDF with serif type, ink on paper and a gold accent. Content-neutral, Dutch and English.
Manual, blank example and zip.
19
2026
Waves, currents, wind, weather, water temperature and tides per spot.
An indication only; always judge conditions yourself on site.
20
2026
The 2025, 2026 and 2027 seasons with circuit map, winners and session times at the track and in Dutch time. Driver and team standings plus the points on offer for every race. Add everything, or a single race, to your calendar, refreshed automatically every day.
21
2026
A music video about freedom, from a girl in the rain to the stars. Sung, with images from all over the world and from space.
22
2026
Free TV channels from all over the world on a modern flatscreen. Zap with the remote, search by country and category.
23
2026
The story of Boccaccio in Destelbergen, the Belgian temple of new beat & house. Timeline, DJs and sources.