Projects by Dennis Klappehttps://dennisklappe.com/https://dennisklappe.com/projects/europasign-vonk/https://dennisklappe.com/projects/europasign-vonk/An internal AI assistant that makes customer and project data available on request, and only changes the CRM or website after a staff member confirms.Tue, 03 Nov 2026 00:00:00 GMThttps://dennisklappe.com/projects/emailit-fanout/https://dennisklappe.com/projects/emailit-fanout/A free Cloudflare Worker that relays one Emailit webhook to as many destinations as you like, each with its own filters.Thu, 29 Oct 2026 00:00:00 GMThttps://dennisklappe.com/projects/openminutes/https://dennisklappe.com/projects/openminutes/A bot that joins Google Meet and Teams meetings, records them and writes the transcript and minutes, on your own server with your own AI keys.Sun, 25 Oct 2026 00:00:00 GMThttps://dennisklappe.com/projects/artica/https://dennisklappe.com/projects/artica/Part-time job improving internal processes at an exhibition and event agency, mostly with AI. Includes a tool that calculates truss loads from the stand model.Tue, 20 Oct 2026 00:00:00 GMThttps://dennisklappe.com/projects/tenderwacht-vergunningwacht/https://dennisklappe.com/projects/tenderwacht-vergunningwacht/Two services that watch new public tenders and permits, and email you when a saved search matches.Wed, 14 Oct 2026 00:00:00 GMThttps://dennisklappe.com/projects/travelbot/https://dennisklappe.com/projects/travelbot/A chat widget that talks with visitors, puts a trip together from the agency's own destinations and hotels, and leads on to the booking page.Thu, 08 Oct 2026 00:00:00 GMThttps://dennisklappe.com/projects/114inkt/https://dennisklappe.com/projects/114inkt/A web shop for compatible Epson 114 ink, built by hand: one codebase for three domains and three languages, with no WordPress or shop platform for the storefront.Tue, 22 Sep 2026 00:00:00 GMThttps://dennisklappe.com/projects/balie/https://dennisklappe.com/projects/balie/A support desk that brings the customer mail and WhatsApp of several companies into one place, with AI-drafted replies that a person reviews and sends.Tue, 15 Sep 2026 00:00:00 GMThttps://dennisklappe.com/projects/mattermore/https://dennisklappe.com/projects/mattermore/A patched build of Mattermost that turns paywalled features back on for self-hosters: group calls, recording, local transcription, single sign-on and guest accounts.Tue, 08 Sep 2026 00:00:00 GMThttps://dennisklappe.com/projects/klappe-cms/https://dennisklappe.com/projects/klappe-cms/The lightweight CMS for Astro that I use on client sites: inline editing, version history and AI that fills fields from pasted text or a file.Tue, 18 Aug 2026 00:00:00 GMThttps://dennisklappe.com/projects/shopify2simplyprint/https://dennisklappe.com/projects/shopify2simplyprint/Adds 3D print jobs to a SimplyPrint queue automatically when a Shopify order is paid. Built for my own shop, then published.Sun, 19 Jul 2026 00:00:00 GMThttps://dennisklappe.com/projects/floravert/https://dennisklappe.com/projects/floravert/An internal web app that turns the stock lists of around 350 growers into one sales list, using AI to read whatever format each supplier sends.Tue, 30 Jun 2026 00:00:00 GMThttps://dennisklappe.com/projects/emdash-plugins/https://dennisklappe.com/projects/emdash-plugins/Four plugins for the EmDash CMS: GitHub-backed content backups, a labelled block editor, a star rating field, and transactional email.Mon, 22 Jun 2026 00:00:00 GMThttps://dennisklappe.com/projects/cf-ledger/https://dennisklappe.com/projects/cf-ledger/A self-hosted Worker that answers the question the Cloudflare dashboard won't: which of my applications is actually costing me money?Sat, 30 May 2026 00:00:00 GMThttps://dennisklappe.com/projects/treingeldterug/https://dennisklappe.com/projects/treingeldterug/The complete backend for a service that automatically claims your money back when a Dutch train is delayed, from detecting the delay to invoicing.Wed, 06 May 2026 00:00:00 GMThttps://dennisklappe.com/projects/careermate/https://dennisklappe.com/projects/careermate/Built the frontend for a recruitment platform, hooked it up to the client's CRM over their API, and added a few AI-driven features on top.Fri, 17 Apr 2026 00:00:00 GMThttps://dennisklappe.com/projects/orcaslicer-waveoverhangs/https://dennisklappe.com/projects/orcaslicer-waveoverhangs/An OrcaSlicer fork that prints steep overhangs up to 90 degrees without support, restructured so the overhang algorithm is pluggable. Over 500 stars.Mon, 13 Apr 2026 00:00:00 GMThttps://dennisklappe.com/projects/huurplug/https://dennisklappe.com/projects/huurplug/Aggregates rental listings from 720+ sources into one free search covering the whole country, because everyone else charges for this.Tue, 24 Mar 2026 00:00:00 GMThttps://dennisklappe.com/projects/geopin/https://dennisklappe.com/projects/geopin/Upload a street photo taken anywhere in the Netherlands and get GPS coordinates back, accurate to within 50 metres, built on open street imagery.Tue, 17 Mar 2026 00:00:00 GMThttps://dennisklappe.com/projects/kvkbase/https://dennisklappe.com/projects/kvkbase/An API for Dutch Chamber of Commerce company data, with transparent pricing, so looking up a business is one request instead of a project.Sun, 15 Mar 2026 00:00:00 GMThttps://dennisklappe.com/projects/syncshopify/https://dennisklappe.com/projects/syncshopify/Custom Shopify apps and integrations that connect a store with whatever else the business runs on: orders, inventory, invoicing, fulfilment.Mon, 23 Feb 2026 00:00:00 GMThttps://dennisklappe.com/projects/hitify/https://dennisklappe.com/projects/hitify/Turns your own Spotify, YouTube Music or Tidal playlist into a QR-code card pack, compatible with the Hitster cards you already own.Sat, 27 Dec 2025 00:00:00 GMThttps://dennisklappe.com/projects/schakel/https://dennisklappe.com/projects/schakel/A set of integrations that connect Bol.com, Shopify and Moneybird, so orders, stock and invoices stay in sync without anyone typing them over.Wed, 17 Dec 2025 00:00:00 GMThttps://dennisklappe.com/projects/cloudmeet/https://dennisklappe.com/projects/cloudmeet/A free meeting scheduler that runs entirely on Cloudflare's free tier, with Google and Outlook calendar sync. Over 500 stars on GitHub.Tue, 02 Dec 2025 00:00:00 GMThttps://dennisklappe.com/projects/europasign/https://dennisklappe.com/projects/europasign/Built the website for a custom LED letter manufacturer, plus a WordPress plugin that pulls all the price calculations out of their order forms.Wed, 22 Oct 2025 00:00:00 GMThttps://dennisklappe.com/projects/rep5x/https://dennisklappe.com/projects/rep5x/My master's thesis: a five-axis retrofit for consumer desktop printers, plus the firmware, browser tooling and community that let other people actually reproduce it.Mon, 20 Oct 2025 00:00:00 GMThttps://dennisklappe.com/projects/zotero-ai-summarizer/https://dennisklappe.com/projects/zotero-ai-summarizer/A Zotero plugin that summarises research articles in place, written during my thesis because the abstract often isn't enough to judge a paper.Wed, 24 Sep 2025 00:00:00 GMThttps://dennisklappe.com/projects/trello-scheduler/https://dennisklappe.com/projects/trello-scheduler/A Chrome extension and Cloudflare Worker that let you schedule Trello comments, so working at 01:00 doesn't mean notifying your client at 01:00.Mon, 22 Sep 2025 00:00:00 GMThttps://dennisklappe.com/projects/starlinktehuur/https://dennisklappe.com/projects/starlinktehuur/A rental platform for the Starlink Mini, from 15 euros a day, for camping, events and working somewhere with no usable connection.Tue, 19 Aug 2025 00:00:00 GMThttps://dennisklappe.com/projects/astro-theme-terminal/https://dennisklappe.com/projects/astro-theme-terminal/A port of panr's Hugo Terminal theme to Astro, because I wanted to use it and it didn't exist yet. Around 70 stars.Sat, 16 Aug 2025 00:00:00 GMThttps://dennisklappe.com/projects/etsy-tools/https://dennisklappe.com/projects/etsy-tools/A PDF-to-Moneybird invoice converter and a Tampermonkey script that translates Etsy listings into every language the platform offers.Mon, 21 Jul 2025 00:00:00 GMThttps://dennisklappe.com/projects/3d-printing-business/https://dennisklappe.com/projects/3d-printing-business/How my 3D printing hobby transformed into a profitable business through automation and online sales.Sun, 12 Jan 2025 00:00:00 GMThttps://dennisklappe.com/projects/pescheck-website-astro-migration/https://dennisklappe.com/projects/pescheck-website-astro-migration/Complete website rebuild for PESCHECK using Astro, transforming a slow WordPress site into a high-performance modern web experience.Fri, 10 Jan 2025 00:00:00 GMThttps://dennisklappe.com/projects/tommy-carving-tool-organization/https://dennisklappe.com/projects/tommy-carving-tool-organization/Designed and 3D printed custom tool holders to organize the workshop and truck of Dutch chainsaw carving champion Thomas Weijenberg.Mon, 17 Jul 2023 00:00:00 GMThttps://dennisklappe.com/projects/photobooth-custom-part/https://dennisklappe.com/projects/photobooth-custom-part/Designed and manufactured a custom part to transport printed photos from printer to customer pickup in a festival photobooth.Wed, 29 Mar 2023 00:00:00 GMThttps://dennisklappe.com/projects/cupclash-beer-pong-robot/https://dennisklappe.com/projects/cupclash-beer-pong-robot/Built an Arduino-controlled beer pong robot that moves based on which colored cups you hit, combining hardware design with interactive software.Mon, 10 May 2021 00:00:00 GMT