nokudos
Turns a Strava or Garmin data export into a year in review: every route on one map, totals, personal bests from the GPS tracks and a card to post.
Strava wanted a subscription for this. I wanted a weekend project.
こんにちは!
Overwind's projects
I write code for pretty much anything that compiles, and apparently for Brazilian payroll law too. Most of it runs in your browser and reads your files on your own machine: no account, no upload, no "we value your privacy" banner, because there is nothing to value.
星月プロジェクト ・ オープンソース
In the browser
Open the page, drop a file, done. Each one keeps working offline after the first visit.
readrecap
Reads the stats database of a Kobo or of KOReader and shows your reading year: books finished, hours, streaks, the time of day you read.
Also confirms that you started 31 books and finished 4.
songlift
Moves your Spotify playlists and liked songs to Navidrome, Jellyfin or M3U files, straight from your Spotify data export. No Spotify API involved.
Spotify limited its API to five users. The export has no such opinion.
Brazilian severance calculator
How much you get when you leave a job under Brazil's CLT, for every kind of termination including fixed-term contracts, with 2026 social security and income tax already taken out. Your salary never leaves the browser.
For checking HR's math before you sign, not after.
cnpj-alfa-scan
Brazil's CNPJ gets letters in July 2026, and a lot of code still stores it as a number. This finds the BIGINT columns, parseInt calls and \d{14} checks first.
Cheaper than finding out in production.
Libraries and servers
For when the problem is yours and the server is too.
- esocial-ts builds, validates, signs and sends eSocial events from Node.js, with the A1 certificate kept on your machine. Source, npm
- open-servicedesk is an IT helpdesk for small companies: tickets, SLAs, email and an asset inventory on your own server. Source
- open-contrib is a GitHub Action that turns a good first issue into an onboarding roadmap for whoever picks it up. Source