MARZBALANCE is a self-contained production line-balancing tool — a single HTML file, no install required. Enter the operators, cycle time and efficiency for each station; it computes the effective time and per-operator takt, flags the bottleneck, and shows the resulting line cadence and pieces per hour. A what-if simulation tells you where adding one operator most improves throughput, and it checks the total time against your target. All data stays in your browser. Open it in any browser and balance the line.

MARZOEE is a self-contained OEE calculator — a single HTML file, no install required. Enter planned time, downtime, ideal cycle time, total pieces and rejects, and it computes Availability × Performance × Quality = OEE in real time, with a bar for each component, a world-class / good / to-improve classification and built-in sanity checks. Record each shift to a history to track the trend. All data stays in your browser, with one-click export and import. The single number every operations manager should watch.

MARZLEAN is a self-contained lean toolkit — five operations tools running from a single HTML file, no install required. A Kanban board with WIP limits, a guided A3 problem-solving template, a Value Stream Map with automatic lead-time and flow-efficiency calculation, a 5S audit with scoring and history, and an OEE calculator with trend tracking. All data stays in your browser, with one-click export and import. Open it in any browser and start improving.

MARZROI is a self-contained ROI & payback calculator — a single HTML file, no install required. Enter the initial investment, recurring income and costs (monthly or yearly), an optional growth rate, the time horizon and any resale or residual value. It computes cash-on-cash ROI, total and annualized return, the payback period in years and months, and a cumulative-cash chart that highlights the break-even year — all in real time. Works for any investment: equipment, a property, a business or a project. All data stays in your browser, with one-click export and import. Open it in any browser and run the numbers.

MARZGANTT is a self-contained Gantt planner — a single HTML file, no install required. On the left, a table where you enter each task name, its duration in days and a start date (pre-filled to today). On the right, the Gantt fills in row by row in real time, with a month-and-day axis, shaded weekends, a "today" marker and hover tooltips showing each task's start and end. All data stays in your browser, with one-click export and import. Open it in any browser and start planning.

MARZPLAN is a self-contained project board — a Kanban workspace that runs from a single HTML file, no install required. Organize work into custom columns, drag cards between stages, tag them with colored labels, set due dates with automatic overdue alerts, assign owners and mark priorities. A built-in search and a quick card editor keep everything one click away. Open it in any browser and start planning.

MARZEN is a self-contained focus & calm companion — three tools in a single HTML file, no install required. A focus timer with a progress ring, automatic focus / break / long-break cycles and daily stats (sessions, focused minutes, streak). A guided breathing module with an expanding orb and three techniques (Box 4-4-4-4, 4-7-8, Calm 4-6). And a daily mood journal with reflection notes and a mood trend. A gentle chime marks each phase. All data stays in your browser, with one-click export and import. Open it in any browser and find your focus.

MARZMEET is a tongue-in-cheek meeting-cost ticker — a single HTML file, no install required. Set the number of participants and an average hourly rate, hit start, and watch the euros tick up live in real time, with a sarcastic comment escalating as the bill grows and a running tally of what you could have bought instead (espressos, spritz, pizzas…). Record meetings to a history. Funny, but it will make your standups shorter.

MARZORACLE is a lean magic 8-ball — a single HTML file, no install required. Ask any operational question, tap the orb, and receive a verdict in pure lean spirit: Kaizen, Muda, Go to the Gemba, Write an A3, Pull don't push, 5 Whys… Each answer comes with a one-line piece of (questionable) wisdom, and your consultations are saved to a history. Half serious, fully fun.

MARZBINGO is a tongue-in-cheek meeting buzzword bingo — a single HTML file, no install required. A 5×5 card of corporate and lean buzzwords with a free centre square: tap each one as you hear it in the meeting, and the moment a row, column or diagonal is complete it shouts BINGO. Reshuffle for a fresh card, name each meeting and keep a history of your wins. All data stays in your browser, with one-click export and import. Funny — and surprisingly good at keeping you awake in long meetings.