Miscellaneous: Alber

3D Modelling (3)

Terrain Erosion Simulator Simulate hydraulic erosion on a heightmap, like the erosion nodes in Gaea: rain droplets carve gullies and sediment fans, with live 3D before/after preview and 16 bit PNG export.
Heightmap to STL Turn a grayscale heightmap (8 or 16 bit PNG) into watertight STL terrain tiles for 3D printing, with 3D preview and anti-warping options.
Soap Film Solids Place elliptic end caps in 3D space and let a smooth, soap-film-like skin span between them; export the organic solid as a watertight STL for 3D printing.

Language Modelling (6)

Token & Character Counter Paste text and count tokens, characters, words, sentences, lines and bytes live - with the o200k_base tokenizer (GPT-4o / o-series) and a colored token view.
Claude Code settings.json Generator Click together a Claude Code settings.json: permission allow/ask/deny rules, Read and Edit path rules resolved against the scope you pick, model, environment variables and defaults. Copy or download the result.
System Prompt Builder Click together a personal system prompt for your chatbot: pick a variant per aspect or leave it out, edit any block, copy the result as Markdown - in English or German.
Local LLM Frontier What is the best language model your GPU can run? VRAM math for weights and KV cache, honest quality bands, rough speed, and the trend: when does frontier quality arrive on your card?
LLM Detector Paste English or German text and get a calibrated probability that a language model wrote it - typical AI phrases marked in the text, the driving features and a Bayes factor laid open.
Language ZipperExperimental Paste a sentence and a character model trained on 87 languages says which one it is - plus a family tree and a map of those languages built from nothing but how cheaply each explains the others. Programming languages too.

Playground (2)

A Model of PsychohistoryExperimental Posterior predictive futures of a galactic civilization - a coupled stochastic model with priors, interventions, credible bands and a few hundred thousand world-lines.
Ruler Title Finder You are newly in power and need a title. Seven questions, a transparent fit score, and 44 historical ruler titles with real history: etymology, notable holders, occupational statistics, and how each ended.

Concepts, Visualised (4)

Lambda Diagrams Type a lambda-calculus expression, see it drawn as a Tromp diagram, and watch beta reduction morph it smoothly, step by step. Church numerals, combinators and your own terms.
Input Shaping Calculator Driving a damped spring-mass system without residual vibration: ZV/ZVD/ZVDD/EI shapers, step response and sensitivity curve.
Ripple Tank A live wave simulation, full screen: a plane wave rolls in from the left, you drop in slits, lenses and prisms or paint walls and glass freehand, and diffraction and refraction happen because the wave equation says so.
Reaction Diffusion Two chemicals, four numbers and a full screen. Drag a cursor across the feed/kill plane and watch the pattern turn from solitons into worms into cells that divide, or paint new seeds into it with the mouse.

For Parents (8)

Name Finder Browse and filter hundreds of german baby names.
Parental Leave Planner for Germany (Elterngeld) A month-by-month grid over 24 life months where both parents assign Basis, ElterngeldPlus or Partnerschaftsbonus months by clicking cells, with total payout, German income tax under the progression clause and a Pareto front of time against cost.
Pregnancy Timeline Maps pregnancy symptoms over pregnancy weeks. Also risk curves for miscarriage probability and premature birth survival.
Child Development Timeline Visualizes developmental milestones across domains. Overlaid with WHO percentile growth charts for weight and height.
Honest Due Date Calculator Models the birth date as a skew-normal distribution with an evidence-based expected due date, based on multiple factors.
Birth Decisions ExplorerExperimental Explore the choices around birth: selecting an option live-locks incompatible ones and explains why. Quantified effects, an evidence traffic-light per statement, and a generated birth-plan draft for the midwife conversation.
Infographic: Baby Sleep, Feeding & Crying Total sleep and longest continuous night stretch, feeding frequency (breast vs. formula), and crying and fussing duration per day.
Infographic: Daycare Infections Infections per year and sick days per year, shown as P10–P90 bands.

Books (3)

Book Recommender Rate the fantasy & sci-fi books you know and get recommendations with calibrated probabilities, a taste map and much more.
E-Book Converter Convert EPUB, MOBI, AZW3, Markdown, HTML and plain text into nine formats, one file or a whole batch.
Narrative ChartExperimental Drop in an English novel and get the xkcd storyline diagram of it: one line per character, bundled while they share a scene.

Images (6)

Meme MakerExperimental Nine layouts to paste your own pictures into with Ctrl+V, captions in the classic heavy face, speech bubbles and labelled arrows on top, a proper deep fry, and a copy to clipboard button. No templates are shipped and nothing is uploaded.
Background Remover Remove a white or single-coloured background entirely in your browser: flood fill keeps enclosed white areas, soft edges avoid the white fringe, and where colour is not enough, an AI mode lets a vision model decide what belongs to the subject. Export as transparent PNG.
Image Editor Crop, scale, rotate, draw, add text and warp the four corners - built on a non-destructive operation stack you can reorder and roll back like a CAD history.
Painting SimulatorExperimental Paint with pigments instead of pixels: colors mix by Kubelka-Munk optics, so blue and yellow make green, pressure comes from your cursor speed, the brush runs out of paint, and every one of these inconveniences has its own off switch.
Color Extractor Find out which colors a photo or logo is really made of, and copy them as hex, CSS or JSON: eight palettes from two to nine colors, each with its share of the image and a preview of the picture reduced to it.
Patch Similarity Explorer Upload an image, click any spot, and see a heatmap of how similar every other region is: DINOv3 vision transformer patch features computed entirely in your browser (a 15 MB model download, no server). A second view colors the features by PCA and segments them with k-means.

Music (4)

Choir Part TrainerExperimental Practise your own part from a MusicXML or MIDI score: your voice loud and the rest quiet, slower tempo, transposition, a count-in and a loop over the four bars that never work, with scrolling notation, a piano roll of all voices and live pitch feedback that also tells you when you have landed in the wrong voice.
Sheet to MIDIExperimental Upload a PDF of cleanly engraved choir music and get practice MIDI back: optical music recognition entirely in your browser, per-voice playback (one voice alone, all, or one loud and the rest quiet), suspect measures flagged for proofreading, export as MIDI and MusicXML.
Sing TrainerExperimental Practice hitting the right notes: scrolling sheet music, live pitch detection from your microphone, generated melodies, scales and hold-the-note drills for every voice type.
Vowel Map See which vowel you are actually singing: the first two formants are estimated live from your microphone by LPC and your voice wanders as a point through the vowel chart. Calibrating on your own corner vowels makes two singers comparable, snapshots and a target vowel help with vowel blending in a choir.

Everything Else (8)

Drug Concentration Visualiser Pharmacokinetic blood-level curves: drag intake times, combine doses and immediate/extended-release forms, and watch steady-state accumulation.
Race Time Predictor Enter your running PBs (10K, marathon, …) and get predictions for every other distance - Riegel formula with a personally fitted fatigue exponent.
Subway Sauce Guide Which sauce goes with which Subway sandwich? Heatmap with switchable color scale.
Leverage & Ruin How much leverage is too much? Monte Carlo simulation of a leveraged ETF over long horizons: volatility drag, the Kelly optimum, break-even leverage and wipe-out probability, fat-tailed daily returns and crash shocks that end a leveraged position in a single day. The average outcome rises without limit while the typical path peaks and turns back down.
When to Close the Windows Should you really shut the windows the moment it is warmer outside than in? A thermal simulation of a flat or house from nothing but the day's minimum and maximum: every combination of closing and reopening time, drawn as a field with the best one marked and the rule of thumb next to it.
Sun over Regensburg Will the sun still reach this spot tomorrow at 20:15? Click anywhere on the map of Regensburg and the official surface model answers for that exact point, buildings and trees included, down to a metre. Hours of sun per day and per year come as maps of their own, and the whole day can be exported as a film.
Meal-Prep-Planer Turns a week of meals into one Sunday batch-cooking timeline, a merged shopping list and a note per dish.
QR Code Generator Free colours, a transparent background by default, PNG and SVG export, and no account anywhere. The error-correction slider shows which modules carry data and which redundancy, and the module shapes run from plain squares to small snakes that crawl across the code while it stays readable, downloadable as GIF or animated SVG.