~/labs
Sitraka Labs: free tools that run in your browser
Sitraka Labs is the name I give to the tools I build in my own time, from Luxembourg. They are free, most run entirely in your browser without an account, and each card says what happens to your data.
Built by Sitraka Forler, systems architect in Luxembourg City, speaker at Voxxed Days Luxembourg 2025. Who is behind it ↓
Work & career
Find a job in Luxembourg, prepare for it, and stay within the cross-border rules.
- Telework Day Counter Count your 34 cross-border telework days the way each tax office counts them.EN · FRRuns in your browser
- Work & Career Save job offers, spot duplicates, score the fit and track your applications.EN · FR · DE · LBSign-in required, data kept in your browser
- RIASEC interest test O*NET Mini Interest Profiler: 30 statements, your Holland code scored in your browser.EN · FRRuns in your browser
- Technical interview prep Coding rounds, a 7-step system design method with timed drills, the leadership round.EN · FRRuns in your browser
Also:Job offersJob fairs in LuxembourgJob sites in Luxembourg
Plan & learn
Schedule a project, learn what research supports, follow a checklist.
- Critical Path Calculator Enter your tasks, get the critical path, total float and a Gantt chart.EN · FRRuns in your browser
- Learn productivity Planning, learning and focus: only methods with published evidence, and the myths to drop.EN · FRRuns in your browser
- Project management MOOC summaries Verified summaries and quizzes for the French-language project management MOOC.EN · FR (modules in French)Guide
Also:Worked example: forward and backward passStudy plan checklistWedding checklist
Regulation & compliance
Read EU financial and cyber rules faster, and get ready for e-invoicing.
Faith & reflection
A verse each morning, a steady rhythm, and your life seen in weeks.
- Christian Daily A Bible verse each morning and a gentle habit tracker, in English, French or German.EN · FR · DENo account needed, optional sync
- Life in Weeks Your whole life as one grid, one square per week, to download as an image.ENRuns in your browser
Also:Bible verse of the dayChurches in Luxembourg by language
Sport
Prepare a race: training phases, paces, taper, weekly check-in.
Also:Weekly race check-inRunning clubs in Luxembourg CityRaces in the agenda
Play
A short break between two tasks.
Also:Play in your browser ↗ (opens in a new tab)Games like the Chrome dino
Open data
Public statistics turned into readable pages, with their sources.
- France budget in figuresDeficit, debt, pensions and climate, from official data.
- Doing business in FranceBusiness start-ups, failures and survival.
- Solar power in Luxembourg ↗Own site ↗Installed solar capacity, from data.public.lu.solaire.sitraka.lu (opens in a new tab)
- Next wage indexation ↗Own site ↗A forecast of the next index tranche in Luxembourg.index.sitraka.lu (opens in a new tab)
- Luxembourg public finances ↗Own site ↗Luxembourg's public finances, in figures.budget.sitraka.lu (opens in a new tab)
- Luxembourg business demography ↗Own site ↗Start-ups, survival and bankruptcies, from STATEC.entreprendre.sitraka.lu (opens in a new tab)
- Carte sanitaire 2025 ↗Own site ↗Luxembourg's health map, made readable.sante.sitraka.lu (opens in a new tab)
- June 2026 heatwave ↗Own site ↗Heat in Luxembourg, from Landsat satellite data.canicule.sitraka.lu (opens in a new tab)
- Luxembourg IT sector ↗Own site ↗Firms, jobs, salaries and AI adoption, from STATEC.luxconseil.sitraka.lu (opens in a new tab)
- India and Luxembourg in numbers ↗Own site ↗People, trade and investment, from official statistics.india.sitraka.lu (opens in a new tab)
On their own websites
Larger Sitraka Labs projects, each with its own site and its own terms.
- LaTeXciOwn site ↗The tools Overleaf forgot: BibTeX suite, converters, 28 templates.latexci.com (opens in a new tab)
- Pompier QuizOwn site ↗Exam prep for francophone firefighters: 11,500 sourced questions.pompier-quiz.fr (opens in a new tab)
- EcoFinLearnOwn site ↗Learn economics & finance, interactively.ecofinlearning.com (opens in a new tab)
How these tools work
- Free to use. Most tools need no account.
- Work & Career requires signing in with Google or GitHub; your job-search data stays in your browser. Christian Daily and Rat Race offer an optional account, to sync your devices (and, for Rat Race, to join the leaderboard).
- In the local tools, what you type stays in your browser. Only anonymous usage counters are sent, never your content.
- One exception to know: the “New verse” button in Christian Daily asks bible-api.com, a site hosted in the United States, for a verse.
- Open source where it helps: ZeRegLens is on GitHub.
Who is behind Sitraka Labs
I'm Sitraka Forler, a systems architect in Luxembourg City. I build these tools in my own time, mostly because I needed them myself. Sitraka Labs is a personal label: the name I put on what I build outside work.
On 20 June 2025 I gave a 15-minute lunch talk at Voxxed Days Luxembourg, at Casino 2000 in Mondorf-les-Bains: “From Data to Decisions: AI-Powered Software Development in the Age of Intelligent Systems”. It covered AI-assisted programming tools, self-healing systems and intelligent monitoring, with real cases: faster code reviews, predicting bugs, automating tedious tasks.
- Watch the recording (15 min, YouTube) ↗ (opens in a new tab)
- Talk page on the Voxxed Days programme ↗ (opens in a new tab)
- More about me →
A bug, a wrong fact, an idea for a tool? Write to hello@sitraka.lu.
Not part of Sitraka Labs: LuxAIOps (lux-aiops.com), a separate venture I co-founded with partners.
Looking for something to do? See the Luxembourg agenda →